diff --git a/CLAUDE.md b/CLAUDE.md
index c618db94..aeebdbf1 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -120,6 +120,8 @@ On a Python workspace, `WorkspaceService` runs `uv sync --extra dev` (not plain
 
 Because the clone is shared across a dev's tasks, a **fresh claim** git-resets the workspace to a clean tree (`git reset --hard`) before checking out the new task's branch — discarding abandoned uncommitted cruft from a finished task while preserving all commits and the gitignored `.venv`. A resume short-circuits before this, so committed work is never reset.
 
+Terminal completion and cancellation also force-delete the task's local branch ref and its `.previews/` video-render dir in the assignee's clone (alongside the existing worktree removal), skipping any branch that coincides with an environment-ladder rung; a PM/CEO can additionally sweep older backlog branches project-wide via `POST /git/branches/cleanup` or the Git page's "Clean Up Stale Branches" button.
+
 ## Git Workflow
 
 ### Branch Naming Convention
diff --git a/docs/map/_complete_map.md b/docs/map/_complete_map.md
index d1c5f83d..d3e16799 100644
--- a/docs/map/_complete_map.md
+++ b/docs/map/_complete_map.md
@@ -2446,7 +2446,7 @@ The FastAPI surface of RoboCo: every HTTP route under `roboco/api/routes/` (the
 | roboco/api/routes/dashboard.py | CEO/auditor/kanban/metrics/agents/activity dashboards. |
 | roboco/api/routes/tasks.py | Task CRUD + lifecycle transitions (claim/start/verify/qa/complete...). |
 | roboco/api/routes/work_session.py | Work-session list/commit/files/PR/merge/complete/abandon. |
-| roboco/api/routes/git.py | Per-project git status/log/diff/commit/push/PR/rebase. |
+| roboco/api/routes/git.py | Per-project git status/log/diff/commit/push/PR/rebase/branch-cleanup sweep. |
 | roboco/api/routes/project.py | Project CRUD + workspace/sync/access + conventions. |
 | roboco/api/routes/product.py | Product CRUD. |
 | roboco/api/routes/optimal.py | RAG: kb/search, rag/query, mentor/ask, learnings, decisions, review. |
@@ -2502,6 +2502,7 @@ The FastAPI surface of RoboCo: every HTTP route under `roboco/api/routes/` (the
 | GET/POST | /api/roadmap/cycles, /cycles/{id}/items/{id}/{approve,reject} | roadmap.py | `require_ceo_role` (agent context) |
 | GET/POST | /api/auth/status (always), /auth/login, /auth/logout (mounted only when `cloud_auth_enabled`) | auth/routes.py | none (status) / FastAPI Users cookie login |
 | GET/POST/PUT/DELETE | /api/projects, /{id}/conventions, /workspace, /sync | project.py | agent context |
+| POST | /api/git/branches/cleanup | git.py | agent context, PM/CEO role-gated like `/rebase`; rate-limit 5/60 — cursor-resumable stale-branch sweep, `GitBranchCleanupRequest`/`Response` (wave 2, open PR #548) |
 | POST | /api/v1/flow/developer/{give_me_work,i_will_work_on,open_pr,i_am_done,unclaim,resume,sync_branch} | flow_dev.py | `require_dev` (role + HMAC) |
 | POST | /api/v1/flow/qa/{claim_review,pass_review,fail_review} | flow_qa.py | `require_qa` |
 | POST | /api/v1/flow/cell_pm/{delegate,submit_up,complete,triage,unblock,reassign} | flow_cell_pm.py | `require_cell_pm` |
@@ -2666,6 +2667,7 @@ roboco/api/
 > - `da563487` Wave 2 (#297) — adds the CEO-only `/api/a2a/chat/admin/{conversations,conversations/{id}/messages,conversations/{id}/reply}` routes (`_require_ceo`) for the A2A live view + reply-as-CEO.
 > - `876e19b3` Wave 2c (#298) — adds `/api/a2a/chat/admin/pairs` (the switchboard, same `_require_ceo` gate); tightens `/api/tasks` PATCH so cell/main PM roles get a content-only field allowlist instead of the unrestricted CEO/Board/Auditor admin bypass (`_pm_editor_scope` / `_enforce_pm_lighter_fields`, `roboco/api/routes/tasks.py:256,278`) — closes an over-permission hole where PM identities could edit any-team tasks via the ASSIGN-holding bypass.
 > - `637c75dc` (2026-07-17, PR #546, "wave-1 quick wins") fix(api): normalize agent UUID to slug at the orchestrator route boundary — `_validated_agent_id` now also calls `_resolve_to_slug` after its path-injection checks, so a caller-supplied DB UUID (e.g. from the panel) resolves to the canonical slug before spawn/stop/status/resolve-wait/mark-waiting address the runtime, fixing UUID-named containers and registry misses.
+> - (open PR #548, branch `feature/wave-2-hygiene-charts`, 2026-07-17) adds `POST /api/git/branches/cleanup` (PM/CEO role-gated like `/rebase`, rate-limit 5/60) + `GitBranchCleanupRequest`/`GitBranchCleanupResponse` schemas — cursor-resumable sweep of terminal tasks' remote+local branches, backing a confirm-dialog button on the panel Git page.
 
 ## Regression Risks
 
@@ -3605,7 +3607,10 @@ The slice is structurally sound: the SAVEPOINT boundary, intermediate-None INVAL
 | `escalate_to_ceo` | method | task.py:5064 | `awaiting_pm_review→awaiting_ceo_approval`; gained `actor_agent_id: UUID | None = None` param (stamped as `audit_agent_id` so the transition row attributes to the specific PM/Board agent, not just the role). |
 | `ceo_approve` | method | task.py:5146 | CEO merges then approves; `awaiting_ceo_approval→completed`. |
 | `ceo_reject` | method | task.py:5414 | Reject → `needs_revision` (dev) or `pending` (branchless root via admin_set_status). |
-| `_remove_task_worktree_on_terminal` | method | task.py:5601 | Best-effort worktree cleanup on complete/ceo_approve; no-op for branchless. |
+| `_delete_task_branch_best_effort` | method | task.py:6726 | Cancel-path cleanup: remote branch delete + `_remove_task_worktree_best_effort(force_branch_delete=True)`; skipped once branch is unset. |
+| `_remove_task_worktree_best_effort` | method | task.py:6767 | Shared worktree+local-branch+previews cleanup called by both cancel and terminal paths; force-deletes the local branch ref unless it's an environment-ladder rung (`effective_environments`). |
+| `_cleanup_task_previews_best_effort` | method | task.py:6804 | `rmtree` the task's `.previews/{task8}` video-render dir; path-containment-checked against the project workspace dir before deleting. |
+| `_remove_task_worktree_on_terminal` | method | task.py:6829 | Best-effort worktree + local-branch (force `-D`, squash-merge is never an ancestor) + previews cleanup on complete/ceo_approve; no-op for branchless. |
 | `cancel` | method | task.py:5644 | Cascade-cancel descendants through the validator. |
 | `reassign` / `reassign_active_claim` | method | task.py:7657 / 7807 | Reassignment with Board/Main-PM diversion guards. |
 | `pr_pass` / `pr_fail` | method | task.py:8100 / 8137 | In-path PR-review gate verdicts. |
@@ -3645,7 +3650,7 @@ stateDiagram-v2
 - TaskService
   - State core: `_validate_and_set_status`, `_emit_status_transition_audit`, `admin_set_status`, `_restore_block_ownership`, `_emit_admin_override_audit`
   - Create/shape: `create`, `_validate_parent_depth`, `_validate_batch_membership`, `activate`
-  - Branch/worktree: `_ensure_branch_for_task`, `_auto_create_branch`, `_remove_task_worktree*`
+  - Branch/worktree: `_ensure_branch_for_task`, `_auto_create_branch`, `_delete_task_branch_best_effort`, `_remove_task_worktree*`, `_cleanup_task_previews_best_effort`
   - Claim: `claim`, `_finalize_claim`, `_inject_proactive_context`, `acquire_*_lock`
   - Lifecycle verbs: `start`, `block*`, `unblock`, `pause`, `resume`, `submit_for_qa`, `pass_qa`, `fail_qa`, `docs_complete`, `submit_for_pm_review`
   - Completion: `complete`, `_apply_complete_approval_chain`, `ceo_approve`, `ceo_reject`, `cancel`
@@ -3684,6 +3689,7 @@ stateDiagram-v2
 - Branchless/umbrella/external-review tasks are exempt from the branch gate inside `GitContext` (task.py:597-611); umbrella is also exempt from the `awaiting_pm_review→awaiting_ceo_approval` pr_number gate.
 - `complete()` requires PR merged (`_assert_pr_merged_for_complete`) EXCEPT branchless roots; `ceo_approve` separately checks `work_session.pr_status=="merged"` and refuses otherwise.
 - Background indexing/learning/cleanup tasks are tracked on `self._background_tasks` and are best-effort — a failure never blocks the transition.
+- Both cancel and terminal-completion now force-delete (`-D`) the task's LOCAL branch ref in the assignee's clone alongside the worktree — a completed task's PR was squash-merged (its local ref is never an ancestor of base, so a "safe" `-d` refuses unconditionally) and a cancelled task's work is discarded by decision, so the ref is spent either way. Skipped when the branch name coincides with an environment-ladder rung (`effective_environments`), which outlives any one task.
 
 ## Drift from CLAUDE.md
 - CLAUDE.md states ceo_reject "~4779 skips _validate_and_set_status in branchless path". Actual: branchless branch of `ceo_reject` is at task.py:5488 and routes through `admin_set_status` (which DOES emit audit at task.py:2100). The non-branchless branch DOES call `_validate_and_set_status` (task.py:5461). No audit gap — the line reference is stale.
@@ -3696,6 +3702,8 @@ stateDiagram-v2
 - `3aff6e04` Chore: Close gaps (#285) — follow-on gap close (worktree-on-terminal cleanup F123 Phase C, escalation audit emit, rework routing hardening).
 
 > Post-snapshot updates (since 2026-06-29): `20f1f9ba` admin_set_status: thread actor_id/actor_role into `_apply_pre_block_restore`; blocked→pending/in_progress restore now attributes the audit row to the admin actor (not the restored owner) and emits a `task.admin_override` row (forced=False, restore=True) independent of the force flag. `b3558d4e` complexity: extract `_restore_block_ownership` (line 8526) + `_emit_admin_override_audit` (line 8555) from `_apply_pre_block_restore` — no behavior change, splits a C-rank block for the xenon gate. `0e7674af` escalate_to_ceo gains `actor_agent_id: UUID | None = None` param stamped as audit_agent_id; push_branch / create_pr / create_root_pr / escalate_to_ceo side-effect handlers in the verb runner now forward actor_agent_id (was dropped, causing wrong workspace or role-only audit attribution).
+>
+> (open PR #548, branch `feature/wave-2-hygiene-charts`, 2026-07-17) Local branch refs stop leaking: `_delete_task_branch_best_effort`/`_remove_task_worktree_on_terminal` now also force-delete the assignee's local branch ref (via new `WorkspaceService.delete_local_branch`) and rmtree the task's `.previews/{task8}` video-preview dir, both skipped for environment-ladder rungs. See the `worksession-git` section for the paired `GitService.cleanup_stale_branches` sweep.
 
 ## Regression Risks
 
@@ -3795,6 +3803,11 @@ This slice is the git substrate every delivery agent works on. `GitService` runs
 | `GitService.sync_task_branch` | method | git.py:3847 | Task-keyed rebase through dev `sync_branch` verb (pre-PR) |
 | `GitService.is_behind_base` | method | git.py:3889 | `(behind, ahead)` counts for i_am_done submit gate |
 | `GitService.close_pull_request` | method | git.py:3940 | Close superseded PR + optional comment + branch cleanup (idempotent) |
+| `GitService._delete_remote_branch_best_effort` | method | git.py:3608 | Best-effort remote delete; skips main/master/develop + open-dependent-PR branches; returns `bool` (issued vs skipped/failed) |
+| `GitService.delete_task_branch` | method | git.py:3671 | Cancel-path remote branch delete; chokepoint for the environment-ladder skip (`effective_environments`) so a task's `branch_name` can never collide-delete a ladder rung; returns `bool` |
+| `GitService.cleanup_stale_branches` | method | git.py:3711 | `POST /git/branches/cleanup` backing sweep: terminal (completed/cancelled) tasks' branches, remote (`delete_task_branch`) + local force-delete in the assignee's clone; capped 200/call, cursor-resumable |
+| `GitService._stale_branch_window` | method | git.py:3777 | One deterministic `ORDER BY id` window of sweep candidates; ladder rungs excluded from results but still advance the cursor |
+| `GitService._cleanup_one_stale_branch` | method | git.py:3810 | Per-branch remote+local delete for one sweep candidate; raises on unexpected failure so the caller's try/except counts it as an error |
 | `GitService.pr_target` | method | git.py:4021 | Return PR base branch (project_id scoped) |
 | `GitService.create_pr` | method | git.py:3418 | Branch-keyed open PR (gateway path; ensures base on remote) |
 | `GitService._record_pr_atomically` | method | git.py:2601 | Atomic pr_number/url write to task |
@@ -3915,6 +3928,7 @@ roboco/
 │           │            _pr_is_merged / _auto_complete_on_merge / _first_allowed_merge_method
 │           ├── branch cleanup: _delete_remote_branch_best_effort / _delete_pr_branch_best_effort
 │           │            delete_task_branch / _branch_has_open_dependents
+│           │            cleanup_stale_branches / _stale_branch_window / _cleanup_one_stale_branch (sweep)
 │           ├── rebase/sync: rebase_onto_base / rebase_pr_for_task / sync_task_branch / is_behind_base
 │           ├── close: close_pull_request
 │           ├── quality: run_pre_submit_quality_gate / toolchain_status_for_task / _fast_gate_commands
@@ -3954,7 +3968,7 @@ External:
 
 ## Entry Points
 
-- **HTTP routes** (`roboco/api/routes/git.py`): `get_status`, `log`, `diff`, `commit_for_task`, `push_for_task`, `create_branch_for_task`, `checkout_branch_for_agent`, `create_pr_for_task`, `merge_pr_for_task`, `pull`, `fetch`, `rebase` — all construct via `get_git_service(db)`.
+- **HTTP routes** (`roboco/api/routes/git.py`): `get_status`, `log`, `diff`, `commit_for_task`, `push_for_task`, `create_branch_for_task`, `checkout_branch_for_agent`, `create_pr_for_task`, `merge_pr_for_task`, `pull`, `fetch`, `rebase`, `cleanup_stale_branches` (`POST /git/branches/cleanup`, PM/CEO role-gated like `/rebase`, rate-limit 5/60) — all construct via `get_git_service(db)`.
 - **HTTP routes** (`roboco/api/routes/tasks.py:253`): `get_git_service` for task-scoped git.
 - **Gateway Choreographer** (`roboco/services/gateway/choreographer/`):
   - `_verb_runner._do_pr_merge` → `pr_merge`
@@ -3999,6 +4013,8 @@ Module-level tunables (not env): `_SLOW_GIT_OP_MS=5000`, `_CI_RUN_WINDOW=20`, `_
 - **Conventions validator fails closed** (`could_not_run=True` blocks submit) on resolution error / timeout / non-zero exit; branchless + no-changed-files fail open.
 - **`_assert_on_task_branch` never discards work** — it does `checkout`, not `reset --hard`, to preserve a resumed agent's unpushed commits.
 - **CEO-only master merge**: `pr_merge` refuses `target == default_branch` for agents; only `merge_pr_for_task` (CEO role-gated from `awaiting_ceo_approval`) may merge to master.
+- **`cleanup_stale_branches` cursor is required, not optional**: task rows never change as a side effect of the sweep (unlike, say, a queue that drains), so a repeat call with no `after_cursor` re-scans the identical first 200-row window forever instead of progressing. `_stale_branch_window` still advances the cursor past ladder-rung rows even though they're excluded from `candidates`, so `truncated` can't false-negative when a rung lands inside the window.
+- **Local branch delete in the sweep is always `force=True`** (`-D`) regardless of completed vs cancelled — a completed task's PR was squash-merged, so its local ref is never an ancestor of base and a "safe" `-d` would refuse every single candidate.
 
 ## Drift from CLAUDE.md
 
@@ -4020,6 +4036,8 @@ Baseline: `fd10cc862c2020b3f639cdb686d427b0198a2441` (master tip before the metr
 | `3aff6e04` (Close gaps) | Same mega-commit (the PR body is identical — #285 is the merge closure of the #283 batch); the in-scope file deltas are the same set of additions. No additional logic change to these files beyond what #283 listed. |
 
 > Post-snapshot updates (since 2026-06-29): `536bbb64` (Chore/all/logical gaps sweep #286 — closed regression risks #108 and #109 in this slice: `_merge_with_retry` now falls back to a permitted merge method on 405 via `_first_allowed_merge_method` before raising `MergeConflictError`; `close_pull_request` default flipped to `delete_branch=False`, choreographer caller now passes `delete_branch=True` explicitly). `00513399` ([bug] push_branch — `push_branch(branch_name)` now passes `branch=branch_name` to `self.push()` so the gateway `open_pr` path pushes the actual named task branch rather than the clone root's current checkout; fixes the "No commits between" 422 → `i_am_blocked` wedge observed in the F123 per-worktree model). `2759edf7` ([B-REL] release executor — added `_CiRunQuery` dataclass at git.py:241 to bundle per-project CI-fetch inputs; `get_latest_ci_conclusion` and `_fetch_latest_ci_run` now accept an optional `head_sha` so the release CI gate polls a specific release commit's own run rather than branch-latest; `settings.release_ci_workflow` config flag added). `69071030` ([chore] work-session-routes — added `WorkSessionService.task_team_for_session` helper (route layer PM cell-ownership check for `merge_pr`); route layer now stamps `merged_by` from the authenticated caller rather than the request body — `WorkSessionService.merge_pr` signature is unchanged, but `MergePRRequest` schema dropped `merged_by` field).
+>
+> (open PR #548, branch `feature/wave-2-hygiene-charts`, 2026-07-17) Local branch refs stop leaking alongside remote ones: `delete_task_branch` now also skips environment-ladder rungs (previously only the remote-delete's own main/master/develop guard existed) and returns `bool`; new `cleanup_stale_branches` + `_stale_branch_window` + `_cleanup_one_stale_branch` back a PM/CEO-only `POST /git/branches/cleanup` sweep of terminal tasks' remote+local branches, exposed as a confirm-dialog button on the panel Git page. See the `task-service` section for the paired per-task reap at cancel/completion and the `workspace` section for the new `WorkspaceService.delete_local_branch` primitive both routes share.
 
 ## Regression Risks
 
@@ -4082,6 +4100,7 @@ WorkspaceService manages the per-agent git clone layout under {workspaces_root}/
 | WorkspaceService._fetch_branch_ref | method | roboco/services/workspace.py:613 | Token-aware git fetch origin <branch> into clone_root; best-effort (never raises); used by ensure_worktree_self_heal (536bbb64) |
 | WorkspaceService.ensure_worktree_self_heal | method | roboco/services/workspace.py:671 | Orchestrator spawn-time chokepoint: re-attaches a per-task worktree after clone vanished (redeploy/disk loss); fetches branch ref from origin when the local ref is absent after a re-clone, then delegates to ensure_worktree (536bbb64) |
 | WorkspaceService.remove_worktree | method | roboco/services/workspace.py:733 | Best-effort git worktree remove --force + prune; no-op if gone (cancel/terminal/reaper evict) |
+| WorkspaceService.delete_local_branch | method | roboco/services/workspace.py:787 | Best-effort `git branch -d/-D <branch>` in a clone; never raises; skips main/master/develop/empty (mirrors GitService._delete_remote_branch_best_effort); callers run it AFTER remove_worktree (a still-checked-out branch refuses) |
 | WorkspaceService.resolve_workspace | method | roboco/services/workspace.py:745 | Look up agent (UUID or slug) -> team+slug -> workspace path; default team BACKEND |
 | WorkspaceService._lookup_agent_or_raise | method | roboco/services/workspace.py:787 | Find agent by UUID or slug; raise WorkspaceError if missing |
 | WorkspaceService._is_workspace_healthy | staticmethod | roboco/services/workspace.py:806 | True only if .git exists AND has HEAD + objects/ (rejects stub clones) |
@@ -4178,7 +4197,7 @@ WorkspaceService slice
 +-- WorkspaceError
 +-- WorkspaceService
 |   +-- Path math: get_workspace_path / get_clone_root_path / get_worktree_path
-|   +-- Worktree ops: _clone_root_default_branch / _park_clone_root_off_branch / _worktree_git / _link_shared_venv / ensure_worktree / ensure_worktree_for_resume / _fetch_branch_ref / ensure_worktree_self_heal / remove_worktree
+|   +-- Worktree ops: _clone_root_default_branch / _park_clone_root_off_branch / _worktree_git / _link_shared_venv / ensure_worktree / ensure_worktree_for_resume / _fetch_branch_ref / ensure_worktree_self_heal / remove_worktree / delete_local_branch
 |   +-- Agent lookup: resolve_workspace / _lookup_agent_or_raise
 |   +-- Health + refs: _is_workspace_healthy / _prune_broken_refs / _fetch_origin_best_effort
 |   +-- Token: _resolve_git_token / _read_clone_token
@@ -4203,6 +4222,7 @@ WorkspaceService slice
 | ensure_worktree_for_resume | roboco/services/workspace.py | GitService._ensure_worktree_for_commit (commit/rebase paths) |
 | ensure_worktree_self_heal | roboco/services/workspace.py | orchestrator._ensure_worktree_before_spawn before -w container launch (replaces the former ensure_worktree_for_resume call there; handles vanished clones + missing branch refs) |
 | remove_worktree | roboco/services/workspace.py | TaskService terminal/cancel paths + claim-rollback (mid-claim failure) |
+| delete_local_branch | roboco/services/workspace.py | TaskService terminal/cancel paths (right after remove_worktree) + GitService.cleanup_stale_branches sweep |
 | ensure_read_clone | roboco/services/workspace.py | ConventionsService.scaffold/effective-map reads (project-level conventions metadata) |
 | dry_upgrade_changes_lockfile | roboco/services/workspace.py | DepUpdateEngine periodic probe loop |
 | fetch_branch_for_inspection | roboco/services/workspace.py | gateway content_actions (QA/Documenter/PM need to read a dev branch) |
@@ -4236,6 +4256,7 @@ WorkspaceService slice
 - dry_upgrade_changes_lockfile holds the read-clone lock only for the local clone step, then releases it before the upgrade runs. The tiny gap between ensure_read_clone releasing and the probe re-acquiring is safe only because any concurrent _sync_read_clone completes under the lock first — a future change that interleaves could race.
 - get_workspace_path raises WorkspaceError if team is None rather than producing a literal 'None' segment; resolve_workspace falls back to Team.BACKEND when agent.team is falsy — agents missing a team silently land under backend/.
 - fetch_branch_for_inspection reuses workspace_clone_timeout (300s) for a single-branch fetch, not the shorter refresh timeout — a hung remote blocks the QA/Doc verb for 5 minutes.
+- delete_local_branch only detaches the ref; remove_worktree only detaches the worktree. Callers MUST run remove_worktree first — `git branch -d/-D` refuses a branch still checked out elsewhere in the clone (the worktree). Skipping the order silently no-ops the branch delete (check=False swallows the refusal).
 
 
 ## Drift from CLAUDE.md
@@ -4258,6 +4279,8 @@ WorkspaceService slice
 | 0f7d6929 | [F-fix] gate the worktree .venv symlink on the clone-root venv existing | _link_shared_venv now no-ops when clone_root/.venv does not yet exist (instead of dangling a symlink), so uv no longer errors or silently re-syncs a worktree-local venv in the near-zero gap before install_dev_deps provisions the clone-root venv. A later ensure self-heals the link. |
 
 > Post-snapshot updates (since 2026-06-29): 5 commits touched workspace.py. (1) 9faf2763 [hotfix] strip VIRTUAL_ENV + UV_PROJECT_ENVIRONMENT from _uv_subprocess_env so workspace uv calls stop warning about the image-baked /app/.venv pin. (2) cfe725da [hotfix] worktree: clone root left on the task branch caused fatal "already checked out" on every worktree add re-dispatch — added _clone_root_default_branch + _park_clone_root_off_branch; ensure_worktree and ensure_worktree_for_resume now call _park_clone_root_off_branch before the add to restore the F123 invariant. (3) 536bbb64 (logical-gap sweep PR#286) added _fetch_branch_ref + ensure_worktree_self_heal: the orchestrator's _ensure_worktree_before_spawn now calls ensure_worktree_self_heal instead of bare ensure_worktree_for_resume so a vanished clone (redeploy/disk loss) that left no local branch ref recovers the pushed commits from origin before re-attaching. (4) 3aff6e04 and 15effce0 (gap-fill PRs #285/#283) contributed earlier worktree + dep-probe plumbing (the _clone_local_into / _probe_lockfile_on_clone split already captured in the baseline).
+>
+> (open PR #548, branch `feature/wave-2-hygiene-charts`, 2026-07-17) Added `delete_local_branch` (line 787) so `TaskService`'s cancel/terminal-completion cleanup and `GitService.cleanup_stale_branches` can reap a spent local branch ref, not just the worktree — previously every task an agent ever claimed leaked a permanent `refs/heads/{branch}` in that agent's clone.
 
 ## Regression Risks
 
@@ -8037,6 +8060,7 @@ The Next.js 16 control panel (`panel/`, package `roboco-panel` v0.14.0) is the s
 | A2A Live (switchboard + reply + New DM) | `app/(dashboard)/a2a/page.tsx` + `components/a2a/*` | CEO watches every agent-to-agent conversation live: default org-chart switchboard (pair cards grouped by cell/PM-chain/board, pulsing on fresh `a2a.message` frames) or the classic conversation list; drill-in shows the transcript + a reply composer that lets the CEO chime into a watched thread as itself (task-linked conversations only). "New DM" opens a fresh CEO-owned 1:1 with any DM-capable agent (no task link needed); the recipient is woken via the a2a_request dispatch path if offline, and the CEO's own threads render with `A2ADirectComposer` instead of the reply composer |
 | Project Settings / Conventions | `components/projects/edit-project-dialog.tsx` + `components/conventions/conventions-tab.tsx` | Per-project `.roboco/conventions.yml` map + health; Save / Restore via PR |
 | Usage Dashboard | `components/dashboard/usage-overview-panel.tsx` + `hooks/use-usage.ts` | Token/cost totals; live WS snapshot with HTTP-polling fallback |
+| Git | `app/(dashboard)/git/page.tsx` | Repository / Work Sessions tabs (business-page tab idiom, `?tab=`); `GitBrowser` (status/branches/log/diff + actions incl. confirm-gated "Clean Up Stale Branches") and `WorkSessionsView` (active sessions, search/status filter kept LOCAL not in URL params); old `/work-sessions` route now redirects to `/git?tab=sessions` |
 | Kanban | `components/kanban/{core,views}/*` | dnd-kit drag board; dev/qa/pm/pr-review views; drag routes through admin status-override with bypass-precondition prompt |
 | Task Detail | `components/tasks/task-detail/*` | Tabbed: overview, plan, progress, commits, sessions, notes, dependencies, AC, action dialogs |
 | AI Providers | `app/(dashboard)/settings/ai-providers/page.tsx` + `components/settings/ai-routing-card.tsx` | Per-slug/role/global model routing |
@@ -8075,6 +8099,11 @@ The Next.js 16 control panel (`panel/`, package `roboco-panel` v0.14.0) is the s
 | `RequiredNotesDialog` | comp | `components/ui/required-notes-dialog.tsx` | Reusable notes-gated confirm; submit disabled on empty/whitespace |
 | `CommandCenter` | comp | `components/dashboard/command-center.tsx` | Overview page body; composes all dashboard cards |
 | `DeliveryTabContent` | comp | `components/metrics/delivery-tab.tsx` | Cycle-time/bottleneck/rework/scorecard panels |
+| `GitActionsPanel` | comp | `components/git/git-actions-panel.tsx` | Commit/push/PR/rebase actions + destructive-confirm "Clean Up Stale Branches" (`AlertDialog`) |
+| `useCleanupBranches` / `handleCleanupBranches` | hook | `hooks/use-git.ts` / `hooks/use-git-browser.ts` | Mutation over `POST /git/branches/cleanup`; the browser hook tracks a per-project cursor ref so a repeat click resumes a truncated sweep instead of re-scanning the first window |
+| `WorkSessionsView` | comp | `components/work-sessions/work-sessions-view.tsx` | Git page's "Work Sessions" tab body; search/status filters are LOCAL `useState`, not URL params |
+| `SessionTrendChart` | comp | `components/work-sessions/session-trend-chart.tsx` | Active-session start-time histogram (hourly/daily bucketing); honestly labeled active-only, no history beyond `GET /work-sessions` |
+| `CostTrendChart` / `SpendTrendChart` | comp | `components/dashboard/cost-trend-chart.tsx` / `components/business/spend-trend-chart.tsx` | Daily-spend area charts off `GET /usage/time-series`; 7d on Overview (`CommandCenter`), 30d on the Business scorecard (`CompanyScorecardCard`) |
 
 ## Data Flow
 Browser → nginx :3000 → (panel Next.js server for pages; `/api/*` and `/ws/*` proxied to `orchestrator:8000`). All client calls use relative URLs: `API_URL="/api"` (axios `baseURL`) and `WS_URL="/ws"` (`getWebSocketUrl`) — no CORS because the browser sees one origin. When cloud auth is armed (`ROBOCO_CLOUD_AUTH_ENABLED`), every navigation to a `(dashboard)` route first runs `proxy.ts` (Next 16's rename of `middleware.ts`), which probes `/auth/status` directly against the docker-internal orchestrator URL (not through nginx) and redirects to `/login` when no `roboco_session` cookie is present; a probe failure/timeout fails OPEN to "cloud auth off" so a slow/unreachable backend never blocks navigation. The login page (`(auth)/login/page.tsx`) posts credentials via `authApi.login` (OAuth2 form body, FastAPI Users' cookie route) and the session cookie rides back on the response. The shared axios client DEFAULTS `X-Agent-ID=<CEO_AGENT_ID>` + `X-Agent-Role=CEO_ROLE` headers for API authorization — `has()`/`set()`, not a flat overwrite, so a call that already set its own headers (the CEO-DM composer's `X-Agent-ID: "ceo"`, needed literally by its route) keeps them. Live events flow: orchestrator `StreamEventBus` → `websocket_bridge` → per-resource `/ws/{agents,notifications,system}` sockets → panel `useWebSocket` hooks → zustand stores / TanStack Query cache. Usage snapshots (`USAGE_SNAPSHOT`) and rate-limit lifecycle (`RATE_LIMIT_HIT/LIFTED`) arrive on the single shared `/ws/system` stream mounted in providers; on any non-`connected` state the usage store clears its snapshot so the panel falls back to HTTP-polling summary until a fresh frame lands. The A2A page's `useA2ALiveStream` is a second, independent consumer of that same shared `/ws/system` connection (not a new socket): every persisted A2A message publishes an `a2a.message` frame, which the page uses purely to invalidate-on-frame (REST via `a2aApi` stays the source of truth for full message bodies, since the frame's excerpt is capped) and to drive the switchboard's 45s pulse fade on the matching pair card.
@@ -8208,6 +8237,7 @@ Deliberately **not** on this card (compose/env-coupled, unsafe for a runtime tog
 - **Switchboard "peeked pair" state**: a pair with `conversation_id: null` (never talked) has nothing to select via `?conversation=`, so `page.tsx` tracks it separately (`peekedPair`) and renders its own empty state — don't conflate this with the ordinary `selectedId` empty-state path when touching the drill-in panel.
 - **`a2aApi.createConversation`/`sendCeoMessage` must pass `X-Agent-ID: "ceo"` explicitly** (via axios per-call `headers`) — the backend routes they hit resolve the caller's identity from that raw header rather than a DB lookup, so the client's *default* `CEO_AGENT_ID` (a UUID) would persist as `agent_a`/`from_agent` and break every downstream `"ceo"`-string check (reply-budget gate, reply-composer recipient exclusion, admin pairing). `client.ts`'s interceptor uses `has()`/`set()` (case-insensitive) specifically so this per-call override isn't clobbered — `AxiosHeaders` bracket access is case-sensitive and would have silently lost a lowercase key.
 - **`A2ANewDmDialog`'s `AgentSelector` uses `excludeRoles`**, a new prop that drops roles from the roster before grouping (not just filters within a group) — used here to exclude the CEO itself plus every role without `read_a2a` on its manifest (auditor, pr_reviewer, prompter, secretary), since a DM to one of them would be a black hole no one ever reads.
+- **Every URL param write forks `ScrollRestoration`'s route key and force-scrolls `<main>` to top** — `WorkSessionsView`'s search/status filters learned this the hard way (a per-keystroke `q=` param bounced the page) and moved to local `useState`; the Git page's own `?tab=` switch is fine since it's a deliberate, infrequent navigation, not per-keystroke. Don't route per-keystroke or high-frequency filter state through `router.replace`/`push` on this page.
 
 ## Drift from CLAUDE.md
 - CLAUDE.md says panel lives at `roboco/panel/` inside this repo — confirmed (no longer a separate `roboco-panel` project). No drift.
@@ -8237,6 +8267,7 @@ Deliberately **not** on this card (compose/env-coupled, unsafe for a runtime tog
 > - `ca07c83f` + `40b1a586` (2026-07-17, PR #546) — scroll-bounce fix: `scroll-restoration.tsx`'s route key now strips UI-only params before comparing (`UI_ONLY_PARAMS=["expanded"]`, exported `buildRouteKey`) so a tasks-page row expand/collapse no longer forks/resets the saved scroll position; new floating `ScrollJumpButtons` (`components/scroll-jump-buttons.tsx`, mounted as a `<main>` sibling in `(dashboard)/layout.tsx`) re-observes `<main>`'s children via `MutationObserver` across a Suspense fallback→content swap so the `ResizeObserver` never watches a detached fallback node; the dead, unfiltered duplicate `hooks/use-scroll-restoration.ts` was deleted; `agent-utils.ts` `AGENT_NAMES` gains `system: "System"` for backend-authored notifications/events.
 > - `d83104e9` + `9a08cb3e` (2026-07-17, PR #546) — `ai-routing-card.tsx` confirm/toast copy now reads "Role/global routing now on … — per-agent pins kept" (was "All agents now on … Clears any overrides"), matching the backend fix that mode switches no longer wipe the whole `model_assignments` table — see `docs/map/support-services.md`.
 > - **Wave 3** (2026-07-17, branch `feature/wave-3-a2a-ceo`, PR #547) — CEO New-DM composer: `a2a-new-dm-dialog.tsx` (opens a fresh CEO-owned 1:1, `AgentSelector`'s new `excludeRoles` prop) + `a2a-direct-composer.tsx` (posts in a CEO-owned thread, no task link needed) wired into `page.tsx`'s composer-selection branch (CEO-owned thread → direct composer; task-linked watched thread → reply composer; else read-only). `use-a2a-live.ts` adds `useCreateCeoConversation`/`useSendCeoMessage`; `lib/api/a2a.ts` adds `createConversation`/`sendCeoMessage` (both force `X-Agent-ID: "ceo"` per-call). `client.ts`'s header injection changed from an unconditional overwrite to a `has()`/`set()` default so a per-call override survives. Backend: `A2AService._maybe_wake_ceo_recipient` wakes an offline `read_a2a`-capable recipient of a CEO DM via the `a2a_request` dispatch path — see `docs/map/a2a-audit-journal-permissions.md`. Same branch also scrubbed "message the CEO" recipes from `docs/rag`/`agents/prompts` (agents are never taught to DM the CEO — reply-only).
+> - (open PR #548, branch `feature/wave-2-hygiene-charts`, 2026-07-17) Wave 2 hygiene + charts: `/work-sessions` route now redirects to `/git?tab=sessions` (moved under Git as a "Work Sessions" tab, `git-page.tsx` gains a `Tabs`); `GitActionsPanel` gains a confirm-gated "Clean Up Stale Branches" button (`useCleanupBranches`, cursor-resumable); `WorkSessionsView`'s filters moved from URL params to local state (ScrollRestoration bounce fix); new `SessionTrendChart` / `CostTrendChart` / `SpendTrendChart`.
 
 ## Regression Risks
 
diff --git a/docs/map/api-routes-schemas.md b/docs/map/api-routes-schemas.md
index 3ddaaca0..e9165151 100644
--- a/docs/map/api-routes-schemas.md
+++ b/docs/map/api-routes-schemas.md
@@ -19,7 +19,7 @@ The FastAPI surface of RoboCo: every HTTP route under `roboco/api/routes/` (the
 | roboco/api/routes/dashboard.py | CEO/auditor/kanban/metrics/agents/activity dashboards. |
 | roboco/api/routes/tasks.py | Task CRUD + lifecycle transitions (claim/start/verify/qa/complete...). |
 | roboco/api/routes/work_session.py | Work-session list/commit/files/PR/merge/complete/abandon. |
-| roboco/api/routes/git.py | Per-project git status/log/diff/commit/push/PR/rebase. |
+| roboco/api/routes/git.py | Per-project git status/log/diff/commit/push/PR/rebase/branch-cleanup sweep. |
 | roboco/api/routes/project.py | Project CRUD + workspace/sync/access + conventions. |
 | roboco/api/routes/product.py | Product CRUD. |
 | roboco/api/routes/optimal.py | RAG: kb/search, rag/query, mentor/ask, learnings, decisions, review. |
@@ -75,6 +75,7 @@ The FastAPI surface of RoboCo: every HTTP route under `roboco/api/routes/` (the
 | GET/POST | /api/roadmap/cycles, /cycles/{id}/items/{id}/{approve,reject} | roadmap.py | `require_ceo_role` (agent context) |
 | GET/POST | /api/auth/status (always), /auth/login, /auth/logout (mounted only when `cloud_auth_enabled`) | auth/routes.py | none (status) / FastAPI Users cookie login |
 | GET/POST/PUT/DELETE | /api/projects, /{id}/conventions, /workspace, /sync | project.py | agent context |
+| POST | /api/git/branches/cleanup | git.py | agent context, PM/CEO role-gated like `/rebase`; rate-limit 5/60 — cursor-resumable stale-branch sweep, `GitBranchCleanupRequest`/`Response` (wave 2, open PR #548) |
 | POST | /api/v1/flow/developer/{give_me_work,i_will_work_on,open_pr,i_am_done,unclaim,resume,sync_branch} | flow_dev.py | `require_dev` (role + HMAC) |
 | POST | /api/v1/flow/qa/{claim_review,pass_review,fail_review} | flow_qa.py | `require_qa` |
 | POST | /api/v1/flow/cell_pm/{delegate,submit_up,complete,triage,unblock,reassign} | flow_cell_pm.py | `require_cell_pm` |
@@ -239,6 +240,7 @@ roboco/api/
 > - `da563487` Wave 2 (#297) — adds the CEO-only `/api/a2a/chat/admin/{conversations,conversations/{id}/messages,conversations/{id}/reply}` routes (`_require_ceo`) for the A2A live view + reply-as-CEO.
 > - `876e19b3` Wave 2c (#298) — adds `/api/a2a/chat/admin/pairs` (the switchboard, same `_require_ceo` gate); tightens `/api/tasks` PATCH so cell/main PM roles get a content-only field allowlist instead of the unrestricted CEO/Board/Auditor admin bypass (`_pm_editor_scope` / `_enforce_pm_lighter_fields`, `roboco/api/routes/tasks.py:256,278`) — closes an over-permission hole where PM identities could edit any-team tasks via the ASSIGN-holding bypass.
 > - `637c75dc` (2026-07-17, PR #546, "wave-1 quick wins") fix(api): normalize agent UUID to slug at the orchestrator route boundary — `_validated_agent_id` now also calls `_resolve_to_slug` after its path-injection checks, so a caller-supplied DB UUID (e.g. from the panel) resolves to the canonical slug before spawn/stop/status/resolve-wait/mark-waiting address the runtime, fixing UUID-named containers and registry misses.
+> - (open PR #548, branch `feature/wave-2-hygiene-charts`, 2026-07-17) adds `POST /api/git/branches/cleanup` (PM/CEO role-gated like `/rebase`, rate-limit 5/60) + `GitBranchCleanupRequest`/`GitBranchCleanupResponse` schemas — cursor-resumable sweep of terminal tasks' remote+local branches, backing a confirm-dialog button on the panel Git page.
 
 ## Regression Risks
 
diff --git a/docs/map/panel.md b/docs/map/panel.md
index 2eab969b..e23fffa1 100644
--- a/docs/map/panel.md
+++ b/docs/map/panel.md
@@ -58,6 +58,7 @@ The Next.js 16 control panel (`panel/`, package `roboco-panel` v0.14.0) is the s
 | A2A Live (switchboard + reply + New DM) | `app/(dashboard)/a2a/page.tsx` + `components/a2a/*` | CEO watches every agent-to-agent conversation live: default org-chart switchboard (pair cards grouped by cell/PM-chain/board, pulsing on fresh `a2a.message` frames) or the classic conversation list; drill-in shows the transcript + a reply composer that lets the CEO chime into a watched thread as itself (task-linked conversations only). "New DM" opens a fresh CEO-owned 1:1 with any DM-capable agent (no task link needed); the recipient is woken via the a2a_request dispatch path if offline, and the CEO's own threads render with `A2ADirectComposer` instead of the reply composer |
 | Project Settings / Conventions | `components/projects/edit-project-dialog.tsx` + `components/conventions/conventions-tab.tsx` | Per-project `.roboco/conventions.yml` map + health; Save / Restore via PR |
 | Usage Dashboard | `components/dashboard/usage-overview-panel.tsx` + `hooks/use-usage.ts` | Token/cost totals; live WS snapshot with HTTP-polling fallback |
+| Git | `app/(dashboard)/git/page.tsx` | Repository / Work Sessions tabs (business-page tab idiom, `?tab=`); `GitBrowser` (status/branches/log/diff + actions incl. confirm-gated "Clean Up Stale Branches") and `WorkSessionsView` (active sessions, search/status filter kept LOCAL not in URL params); old `/work-sessions` route now redirects to `/git?tab=sessions` |
 | Kanban | `components/kanban/{core,views}/*` | dnd-kit drag board; dev/qa/pm/pr-review views; drag routes through admin status-override with bypass-precondition prompt |
 | Task Detail | `components/tasks/task-detail/*` | Tabbed: overview, plan, progress, commits, sessions, notes, dependencies, **findings**, AC, action dialogs |
 | AI Providers | `app/(dashboard)/settings/ai-providers/page.tsx` + `components/settings/ai-routing-card.tsx` | Per-slug/role/global model routing |
@@ -96,6 +97,11 @@ The Next.js 16 control panel (`panel/`, package `roboco-panel` v0.14.0) is the s
 | `RequiredNotesDialog` | comp | `components/ui/required-notes-dialog.tsx` | Reusable notes-gated confirm; submit disabled on empty/whitespace |
 | `CommandCenter` | comp | `components/dashboard/command-center.tsx` | Overview page body; composes all dashboard cards |
 | `DeliveryTabContent` | comp | `components/metrics/delivery-tab.tsx` | Cycle-time/bottleneck/rework/scorecard panels |
+| `GitActionsPanel` | comp | `components/git/git-actions-panel.tsx` | Commit/push/PR/rebase actions + destructive-confirm "Clean Up Stale Branches" (`AlertDialog`) |
+| `useCleanupBranches` / `handleCleanupBranches` | hook | `hooks/use-git.ts` / `hooks/use-git-browser.ts` | Mutation over `POST /git/branches/cleanup`; the browser hook tracks a per-project cursor ref so a repeat click resumes a truncated sweep instead of re-scanning the first window |
+| `WorkSessionsView` | comp | `components/work-sessions/work-sessions-view.tsx` | Git page's "Work Sessions" tab body; search/status filters are LOCAL `useState`, not URL params |
+| `SessionTrendChart` | comp | `components/work-sessions/session-trend-chart.tsx` | Active-session start-time histogram (hourly/daily bucketing); honestly labeled active-only, no history beyond `GET /work-sessions` |
+| `CostTrendChart` / `SpendTrendChart` | comp | `components/dashboard/cost-trend-chart.tsx` / `components/business/spend-trend-chart.tsx` | Daily-spend area charts off `GET /usage/time-series`; 7d on Overview (`CommandCenter`), 30d on the Business scorecard (`CompanyScorecardCard`) |
 
 ## Data Flow
 Browser → nginx :3000 → (panel Next.js server for pages; `/api/*` and `/ws/*` proxied to `orchestrator:8000`). All client calls use relative URLs: `API_URL="/api"` (axios `baseURL`) and `WS_URL="/ws"` (`getWebSocketUrl`) — no CORS because the browser sees one origin. When cloud auth is armed (`ROBOCO_CLOUD_AUTH_ENABLED`), every navigation to a `(dashboard)` route first runs `proxy.ts` (Next 16's rename of `middleware.ts`), which probes `/auth/status` directly against the docker-internal orchestrator URL (not through nginx) and redirects to `/login` when no `roboco_session` cookie is present; a probe failure/timeout fails OPEN to "cloud auth off" so a slow/unreachable backend never blocks navigation. The login page (`(auth)/login/page.tsx`) posts credentials via `authApi.login` (OAuth2 form body, FastAPI Users' cookie route) and the session cookie rides back on the response. The shared axios client DEFAULTS `X-Agent-ID=<CEO_AGENT_ID>` + `X-Agent-Role=CEO_ROLE` headers for API authorization — `has()`/`set()`, not a flat overwrite, so a call that already set its own headers (the CEO-DM composer's `X-Agent-ID: "ceo"`, needed literally by its route) keeps them. Live events flow: orchestrator `StreamEventBus` → `websocket_bridge` → per-resource `/ws/{agents,notifications,system}` sockets → panel `useWebSocket` hooks → zustand stores / TanStack Query cache. Usage snapshots (`USAGE_SNAPSHOT`) and rate-limit lifecycle (`RATE_LIMIT_HIT/LIFTED`) arrive on the single shared `/ws/system` stream mounted in providers; on any non-`connected` state the usage store clears its snapshot so the panel falls back to HTTP-polling summary until a fresh frame lands. The A2A page's `useA2ALiveStream` is a second, independent consumer of that same shared `/ws/system` connection (not a new socket): every persisted A2A message publishes an `a2a.message` frame, which the page uses purely to invalidate-on-frame (REST via `a2aApi` stays the source of truth for full message bodies, since the frame's excerpt is capped) and to drive the switchboard's 45s pulse fade on the matching pair card.
@@ -229,6 +235,7 @@ Deliberately **not** on this card (compose/env-coupled, unsafe for a runtime tog
 - **Switchboard "peeked pair" state**: a pair with `conversation_id: null` (never talked) has nothing to select via `?conversation=`, so `page.tsx` tracks it separately (`peekedPair`) and renders its own empty state — don't conflate this with the ordinary `selectedId` empty-state path when touching the drill-in panel.
 - **`a2aApi.createConversation`/`sendCeoMessage` must pass `X-Agent-ID: "ceo"` explicitly** (via axios per-call `headers`) — the backend routes they hit resolve the caller's identity from that raw header rather than a DB lookup, so the client's *default* `CEO_AGENT_ID` (a UUID) would persist as `agent_a`/`from_agent` and break every downstream `"ceo"`-string check (reply-budget gate, reply-composer recipient exclusion, admin pairing). `client.ts`'s interceptor uses `has()`/`set()` (case-insensitive) specifically so this per-call override isn't clobbered — `AxiosHeaders` bracket access is case-sensitive and would have silently lost a lowercase key.
 - **`A2ANewDmDialog`'s `AgentSelector` uses `excludeRoles`**, a new prop that drops roles from the roster before grouping (not just filters within a group) — used here to exclude the CEO itself plus every role without `read_a2a` on its manifest (auditor, pr_reviewer, prompter, secretary), since a DM to one of them would be a black hole no one ever reads.
+- **Every URL param write forks `ScrollRestoration`'s route key and force-scrolls `<main>` to top** — `WorkSessionsView`'s search/status filters learned this the hard way (a per-keystroke `q=` param bounced the page) and moved to local `useState`; the Git page's own `?tab=` switch is fine since it's a deliberate, infrequent navigation, not per-keystroke. Don't route per-keystroke or high-frequency filter state through `router.replace`/`push` on this page.
 
 ## Drift from CLAUDE.md
 - CLAUDE.md says panel lives at `roboco/panel/` inside this repo — confirmed (no longer a separate `roboco-panel` project). No drift.
@@ -258,6 +265,7 @@ Deliberately **not** on this card (compose/env-coupled, unsafe for a runtime tog
 > - `ca07c83f` + `40b1a586` (2026-07-17, PR #546) — scroll-bounce fix: `scroll-restoration.tsx`'s route key now strips UI-only params before comparing (`UI_ONLY_PARAMS=["expanded"]`, exported `buildRouteKey`) so a tasks-page row expand/collapse no longer forks/resets the saved scroll position; new floating `ScrollJumpButtons` (`components/scroll-jump-buttons.tsx`, mounted as a `<main>` sibling in `(dashboard)/layout.tsx`) re-observes `<main>`'s children via `MutationObserver` across a Suspense fallback→content swap so the `ResizeObserver` never watches a detached fallback node; the dead, unfiltered duplicate `hooks/use-scroll-restoration.ts` was deleted; `agent-utils.ts` `AGENT_NAMES` gains `system: "System"` for backend-authored notifications/events.
 > - `d83104e9` + `9a08cb3e` (2026-07-17, PR #546) — `ai-routing-card.tsx` confirm/toast copy now reads "Role/global routing now on … — per-agent pins kept" (was "All agents now on … Clears any overrides"), matching the backend fix that mode switches no longer wipe the whole `model_assignments` table — see `docs/map/support-services.md`.
 > - **Wave 3** (2026-07-17, branch `feature/wave-3-a2a-ceo`, PR #547) — CEO New-DM composer: `a2a-new-dm-dialog.tsx` (opens a fresh CEO-owned 1:1, `AgentSelector`'s new `excludeRoles` prop) + `a2a-direct-composer.tsx` (posts in a CEO-owned thread, no task link needed) wired into `page.tsx`'s composer-selection branch (CEO-owned thread → direct composer; task-linked watched thread → reply composer; else read-only). `use-a2a-live.ts` adds `useCreateCeoConversation`/`useSendCeoMessage`; `lib/api/a2a.ts` adds `createConversation`/`sendCeoMessage` (both force `X-Agent-ID: "ceo"` per-call). `client.ts`'s header injection changed from an unconditional overwrite to a `has()`/`set()` default so a per-call override survives. Backend: `A2AService._maybe_wake_ceo_recipient` wakes an offline `read_a2a`-capable recipient of a CEO DM via the `a2a_request` dispatch path — see `docs/map/a2a-audit-journal-permissions.md`. Same branch also scrubbed "message the CEO" recipes from `docs/rag`/`agents/prompts` (agents are never taught to DM the CEO — reply-only).
+> - (open PR #548, branch `feature/wave-2-hygiene-charts`, 2026-07-17) Wave 2 hygiene + charts: `/work-sessions` route now redirects to `/git?tab=sessions` (moved under Git as a "Work Sessions" tab, `git-page.tsx` gains a `Tabs`); `GitActionsPanel` gains a confirm-gated "Clean Up Stale Branches" button (`useCleanupBranches`, cursor-resumable); `WorkSessionsView`'s filters moved from URL params to local state (ScrollRestoration bounce fix); new `SessionTrendChart` / `CostTrendChart` / `SpendTrendChart`.
 
 ## Regression Risks
 
diff --git a/docs/map/task-service.md b/docs/map/task-service.md
index 0bbb0f85..d38abda5 100644
--- a/docs/map/task-service.md
+++ b/docs/map/task-service.md
@@ -55,7 +55,10 @@
 | `escalate_to_ceo` | method | task.py:5064 | `awaiting_pm_review→awaiting_ceo_approval`; gained `actor_agent_id: UUID | None = None` param (stamped as `audit_agent_id` so the transition row attributes to the specific PM/Board agent, not just the role). |
 | `ceo_approve` | method | task.py:5146 | CEO merges then approves; `awaiting_ceo_approval→completed`. |
 | `ceo_reject` | method | task.py:5414 | Reject → `needs_revision` (dev) or `pending` (branchless root via admin_set_status); now validates `reason` (`reject_trivial` — previously an uncaught Pydantic error could 500 on empty/trivial input) and inserts one `origin=ceo` Finding onto the revision-findings ledger; the branchless-root path manually bumps `revision_count` + emits `task.ceo_reject` since it skips `_emit_status_transition_audit`. See `docs/map/review-findings.md`. |
-| `_remove_task_worktree_on_terminal` | method | task.py:5601 | Best-effort worktree cleanup on complete/ceo_approve; no-op for branchless. |
+| `_delete_task_branch_best_effort` | method | task.py:6726 | Cancel-path cleanup: remote branch delete + `_remove_task_worktree_best_effort(force_branch_delete=True)`; skipped once branch is unset. |
+| `_remove_task_worktree_best_effort` | method | task.py:6767 | Shared worktree+local-branch+previews cleanup called by both cancel and terminal paths; force-deletes the local branch ref unless it's an environment-ladder rung (`effective_environments`). |
+| `_cleanup_task_previews_best_effort` | method | task.py:6804 | `rmtree` the task's `.previews/{task8}` video-render dir; path-containment-checked against the project workspace dir before deleting. |
+| `_remove_task_worktree_on_terminal` | method | task.py:6829 | Best-effort worktree + local-branch (force `-D`, squash-merge is never an ancestor) + previews cleanup on complete/ceo_approve; no-op for branchless. |
 | `cancel` | method | task.py:5644 | Cascade-cancel descendants through the validator. |
 | `reassign` / `reassign_active_claim` | method | task.py:7657 / 7807 | Reassignment with Board/Main-PM diversion guards. |
 | `pr_pass` / `pr_fail` | method | task.py:8100 / 8137 | In-path PR-review gate verdicts; `pr_fail` transitions to `needs_revision`, then calls `_alert_auditor_of_rework` after flush to emit a best-effort auditor rework ALERT. |
@@ -96,7 +99,7 @@ stateDiagram-v2
 - TaskService
   - State core: `_validate_and_set_status`, `_emit_status_transition_audit`, `admin_set_status`, `_restore_block_ownership`, `_emit_admin_override_audit`
   - Create/shape: `create`, `_validate_parent_depth`, `_validate_batch_membership`, `activate`
-  - Branch/worktree: `_ensure_branch_for_task`, `_auto_create_branch`, `_remove_task_worktree*`
+  - Branch/worktree: `_ensure_branch_for_task`, `_auto_create_branch`, `_delete_task_branch_best_effort`, `_remove_task_worktree*`, `_cleanup_task_previews_best_effort`
   - Claim: `claim`, `_validate_claim_preconditions`, `_claim_blocked_by_sequence`, `_claim_blocked_by_dependencies`, `_finalize_claim`, `_apply_dependency_lineage`, `_inject_proactive_context`, `acquire_*_lock`
   - Lifecycle verbs: `start`, `block*`, `unblock`, `pause`, `resume`, `submit_for_qa`, `pass_qa`, `fail_qa`, `docs_complete`, `submit_for_pm_review`
   - Completion: `complete`, `_apply_complete_approval_chain`, `ceo_approve`, `ceo_reject`, `cancel`
@@ -138,6 +141,7 @@ stateDiagram-v2
 - The sequence gate (`_claim_blocked_by_sequence`) is enforced ONLY in `_validate_claim_preconditions`, i.e. inside `claim` itself — both the gateway claim verbs AND the orchestrator's raw dispatch claim cross it because they both funnel through `TaskService.claim`, unlike the pre-#382 dependency gate which briefly lived only on the gateway side. Any future claim path that bypasses `TaskService.claim` (a raw `admin_set_status`, for instance) does NOT get sequence enforcement.
 - `_apply_dependency_lineage` is scoped to SAME-REPO dependencies only (`dep_task.project_id != ctx.project.id` short-circuits) — a cross-repo dependency edge (e.g. a MegaTask root-subtask in another project) has no shared git history to merge and is silently skipped; the dependency TIMING gate still holds the claim regardless of repo.
 - `TaskTable.orchestration_markers` is generic `JSON`, not `JSONB`. Any SQL predicate on a marker key must use `.as_string()` (or the JSON dialect's generic comparator), not `.astext`, which is JSONB-only and raises `AttributeError` at compile time. `list_open_docs_sync_tasks(version=...)` at task.py:1596 is the current example; the inline comment records the rationale.
+- Both cancel and terminal-completion now force-delete (`-D`) the task's LOCAL branch ref in the assignee's clone alongside the worktree — a completed task's PR was squash-merged (its local ref is never an ancestor of base, so a "safe" `-d` refuses unconditionally) and a cancelled task's work is discarded by decision, so the ref is spent either way. Skipped when the branch name coincides with an environment-ladder rung (`effective_environments`), which outlives any one task.
 
 ## Drift from CLAUDE.md
 - CLAUDE.md states ceo_reject "~4779 skips _validate_and_set_status in branchless path". Actual: branchless branch of `ceo_reject` is at task.py:5488 and routes through `admin_set_status` (which DOES emit audit at task.py:2100). The non-branchless branch DOES call `_validate_and_set_status` (task.py:5461). No audit gap — the line reference is stale.
@@ -152,6 +156,8 @@ stateDiagram-v2
 > Post-snapshot updates (since 2026-06-29): `20f1f9ba` admin_set_status: thread actor_id/actor_role into `_apply_pre_block_restore`; blocked→pending/in_progress restore now attributes the audit row to the admin actor (not the restored owner) and emits a `task.admin_override` row (forced=False, restore=True) independent of the force flag. `b3558d4e` complexity: extract `_restore_block_ownership` (line 8526) + `_emit_admin_override_audit` (line 8555) from `_apply_pre_block_restore` — no behavior change, splits a C-rank block for the xenon gate. `0e7674af` escalate_to_ceo gains `actor_agent_id: UUID | None = None` param stamped as audit_agent_id; push_branch / create_pr / create_root_pr / escalate_to_ceo side-effect handlers in the verb runner now forward actor_agent_id (was dropped, causing wrong workspace or role-only audit attribution). `8f3f4236` (#452) "sequence is the bar" — adds `_claim_blocked_by_sequence` + `_validate_claim_preconditions` wiring, `stamp_wave_sequence` (replacing a raw per-sibling delegation ordinal), and migration 069 (`tasks.parent_task_id` index, the sibling probe's hot path). `f2834cf5` (#466) adds `_apply_dependency_lineage`/`_merge_one_dependency`, called from `_create_branch_in_project` right after a fresh branch cut. `61e00832` (PR #492) added `_alert_auditor_of_rework()` and invoked it from `fail_qa`, `pr_fail`, and `request_changes` after each transition to `needs_revision`, wiring the reactive auditor ALERT path. `f6c75237` (PR #509) restored those `_alert_auditor_of_rework()` calls after they were accidentally deleted by the docs-sync PR: all three call sites now dispatch the alert immediately after `await self.session.flush()` so the `needs_revision` transition row is committed before the auditor notification is created. The same commit also changed the descendant-traversal casts in `_supersede_replacement_landed` and `get_all_descendants`, but it used `cast(UUID, child.id)` with a scoped `# noqa: TC006` and `child.id` with a `# type: ignore[arg-type]`, respectively. `e4b7dd0f` / PR #511 reverted those two cast regressions to the preferred string-literal form `cast('UUID', child.id)` with no lint or type suppression, leaving `DOCS_SYNC_SOURCE` and `list_open_docs_sync_tasks` untouched.
 >
 > (uncommitted, branch `feature/findings-ledger`, 2026-07-11) Revision-findings ledger: `_audit_events_for` (task.py:997) gains `task.request_changes` (agent_role `cell_pm`/`main_pm`) and `task.ceo_reject` (agent_role `ceo`) branches alongside the existing `task.qa_fail`/`task.pr_fail`; `ceo_reject` gains reason validation + a ledger `Finding` insert (see above); `qa_fail` and `request_changes` drop their raw `dev_notes` appends (the mirror-column data-loss bug) in favor of the ledger + a structured note. Full detail: `docs/map/review-findings.md`.
+>
+> (open PR #548, branch `feature/wave-2-hygiene-charts`, 2026-07-17) Local branch refs stop leaking: `_delete_task_branch_best_effort`/`_remove_task_worktree_on_terminal` now also force-delete the assignee's local branch ref (via new `WorkspaceService.delete_local_branch`) and rmtree the task's `.previews/{task8}` video-preview dir, both skipped for environment-ladder rungs. See `docs/map/worksession-git.md` for the paired `GitService.cleanup_stale_branches` sweep.
 
 ## Regression Risks
 
diff --git a/docs/map/worksession-git.md b/docs/map/worksession-git.md
index 51b75b5f..8c94552e 100644
--- a/docs/map/worksession-git.md
+++ b/docs/map/worksession-git.md
@@ -83,6 +83,11 @@ This slice is the git substrate every delivery agent works on. `GitService` runs
 | `GitService.sync_task_branch` | method | git.py:3847 | Task-keyed rebase through dev `sync_branch` verb (pre-PR) |
 | `GitService.is_behind_base` | method | git.py:3889 | `(behind, ahead)` counts for i_am_done submit gate |
 | `GitService.close_pull_request` | method | git.py:3940 | Close superseded PR + optional comment + branch cleanup (idempotent) |
+| `GitService._delete_remote_branch_best_effort` | method | git.py:3608 | Best-effort remote delete; skips main/master/develop + open-dependent-PR branches; returns `bool` (issued vs skipped/failed) |
+| `GitService.delete_task_branch` | method | git.py:3671 | Cancel-path remote branch delete; chokepoint for the environment-ladder skip (`effective_environments`) so a task's `branch_name` can never collide-delete a ladder rung; returns `bool` |
+| `GitService.cleanup_stale_branches` | method | git.py:3711 | `POST /git/branches/cleanup` backing sweep: terminal (completed/cancelled) tasks' branches, remote (`delete_task_branch`) + local force-delete in the assignee's clone; capped 200/call, cursor-resumable |
+| `GitService._stale_branch_window` | method | git.py:3777 | One deterministic `ORDER BY id` window of sweep candidates; ladder rungs excluded from results but still advance the cursor |
+| `GitService._cleanup_one_stale_branch` | method | git.py:3810 | Per-branch remote+local delete for one sweep candidate; raises on unexpected failure so the caller's try/except counts it as an error |
 | `GitService.pr_target` | method | git.py:4021 | Return PR base branch (project_id scoped) |
 | `GitService.create_pr` | method | git.py:3418 | Branch-keyed open PR (gateway path; ensures base on remote) |
 | `GitService._record_pr_atomically` | method | git.py:2601 | Atomic pr_number/url write to task |
@@ -203,6 +208,7 @@ roboco/
 │           │            _pr_is_merged / _auto_complete_on_merge / _first_allowed_merge_method
 │           ├── branch cleanup: _delete_remote_branch_best_effort / _delete_pr_branch_best_effort
 │           │            delete_task_branch / _branch_has_open_dependents
+│           │            cleanup_stale_branches / _stale_branch_window / _cleanup_one_stale_branch (sweep)
 │           ├── rebase/sync: rebase_onto_base / rebase_pr_for_task / sync_task_branch / is_behind_base
 │           ├── close: close_pull_request
 │           ├── quality: run_pre_submit_quality_gate / toolchain_status_for_task / _fast_gate_commands
@@ -242,7 +248,7 @@ External:
 
 ## Entry Points
 
-- **HTTP routes** (`roboco/api/routes/git.py`): `get_status`, `log`, `diff`, `commit_for_task`, `push_for_task`, `create_branch_for_task`, `checkout_branch_for_agent`, `create_pr_for_task`, `merge_pr_for_task`, `pull`, `fetch`, `rebase` — all construct via `get_git_service(db)`.
+- **HTTP routes** (`roboco/api/routes/git.py`): `get_status`, `log`, `diff`, `commit_for_task`, `push_for_task`, `create_branch_for_task`, `checkout_branch_for_agent`, `create_pr_for_task`, `merge_pr_for_task`, `pull`, `fetch`, `rebase`, `cleanup_stale_branches` (`POST /git/branches/cleanup`, PM/CEO role-gated like `/rebase`, rate-limit 5/60) — all construct via `get_git_service(db)`.
 - **HTTP routes** (`roboco/api/routes/tasks.py:253`): `get_git_service` for task-scoped git.
 - **Gateway Choreographer** (`roboco/services/gateway/choreographer/`):
   - `_verb_runner._do_pr_merge` → `pr_merge`
@@ -287,6 +293,8 @@ Module-level tunables (not env): `_SLOW_GIT_OP_MS=5000`, `_CI_RUN_WINDOW=20`, `_
 - **Conventions validator fails closed** (`could_not_run=True` blocks submit) on resolution error / timeout / non-zero exit; branchless + no-changed-files fail open.
 - **`_assert_on_task_branch` never discards work** — it does `checkout`, not `reset --hard`, to preserve a resumed agent's unpushed commits.
 - **CEO-only master merge**: `pr_merge` refuses `target == default_branch` for agents; only `merge_pr_for_task` (CEO role-gated from `awaiting_ceo_approval`) may merge to master. `default_branch` resolves through the env-ladder head rung (`_project_default_branch` → `head_branch(project)`), not the raw `projects.default_branch` column.
+- **`cleanup_stale_branches` cursor is required, not optional**: task rows never change as a side effect of the sweep (unlike, say, a queue that drains), so a repeat call with no `after_cursor` re-scans the identical first 200-row window forever instead of progressing. `_stale_branch_window` still advances the cursor past ladder-rung rows even though they're excluded from `candidates`, so `truncated` can't false-negative when a rung lands inside the window.
+- **Local branch delete in the sweep is always `force=True`** (`-D`) regardless of completed vs cancelled — a completed task's PR was squash-merged, so its local ref is never an ancestor of base and a "safe" `-d` would refuse every single candidate.
 
 ## Drift from CLAUDE.md
 
@@ -308,6 +316,8 @@ Baseline: `fd10cc862c2020b3f639cdb686d427b0198a2441` (master tip before the metr
 | `3aff6e04` (Close gaps) | Same mega-commit (the PR body is identical — #285 is the merge closure of the #283 batch); the in-scope file deltas are the same set of additions. No additional logic change to these files beyond what #283 listed. |
 
 > Post-snapshot updates (since 2026-06-29): `536bbb64` (Chore/all/logical gaps sweep #286 — closed regression risks #108 and #109 in this slice: `_merge_with_retry` now falls back to a permitted merge method on 405 via `_first_allowed_merge_method` before raising `MergeConflictError`; `close_pull_request` default flipped to `delete_branch=False`, choreographer caller now passes `delete_branch=True` explicitly). `00513399` ([bug] push_branch — `push_branch(branch_name)` now passes `branch=branch_name` to `self.push()` so the gateway `open_pr` path pushes the actual named task branch rather than the clone root's current checkout; fixes the "No commits between" 422 → `i_am_blocked` wedge observed in the F123 per-worktree model). `2759edf7` ([B-REL] release executor — added `_CiRunQuery` dataclass at git.py:241 to bundle per-project CI-fetch inputs; `get_latest_ci_conclusion` and `_fetch_latest_ci_run` now accept an optional `head_sha` so the release CI gate polls a specific release commit's own run rather than branch-latest; `settings.release_ci_workflow` config flag added). `69071030` ([chore] work-session-routes — added `WorkSessionService.task_team_for_session` helper (route layer PM cell-ownership check for `merge_pr`); route layer now stamps `merged_by` from the authenticated caller rather than the request body — `WorkSessionService.merge_pr` signature is unchanged, but `MergePRRequest` schema dropped `merged_by` field).
+>
+> (open PR #548, branch `feature/wave-2-hygiene-charts`, 2026-07-17) Local branch refs stop leaking alongside remote ones: `delete_task_branch` now also skips environment-ladder rungs (previously only the remote-delete's own main/master/develop guard existed) and returns `bool`; new `cleanup_stale_branches` + `_stale_branch_window` + `_cleanup_one_stale_branch` back a PM/CEO-only `POST /git/branches/cleanup` sweep of terminal tasks' remote+local branches, exposed as a confirm-dialog button on the panel Git page. See `docs/map/task-service.md` for the paired per-task reap at cancel/completion and `docs/map/workspace.md` for the new `WorkspaceService.delete_local_branch` primitive both routes share.
 
 ## Regression Risks
 
diff --git a/docs/map/workspace.md b/docs/map/workspace.md
index 534a2116..fcd640d7 100644
--- a/docs/map/workspace.md
+++ b/docs/map/workspace.md
@@ -39,6 +39,7 @@ WorkspaceService manages the per-agent git clone layout under {workspaces_root}/
 | WorkspaceService._fetch_branch_ref | method | roboco/services/workspace.py:613 | Token-aware git fetch origin <branch> into clone_root; best-effort (never raises); used by ensure_worktree_self_heal (536bbb64) |
 | WorkspaceService.ensure_worktree_self_heal | method | roboco/services/workspace.py:671 | Orchestrator spawn-time chokepoint: re-attaches a per-task worktree after clone vanished (redeploy/disk loss); fetches branch ref from origin when the local ref is absent after a re-clone, then delegates to ensure_worktree (536bbb64) |
 | WorkspaceService.remove_worktree | method | roboco/services/workspace.py:733 | Best-effort git worktree remove --force + prune; no-op if gone (cancel/terminal/reaper evict) |
+| WorkspaceService.delete_local_branch | method | roboco/services/workspace.py:787 | Best-effort `git branch -d/-D <branch>` in a clone; never raises; skips main/master/develop/empty (mirrors GitService._delete_remote_branch_best_effort); callers run it AFTER remove_worktree (a still-checked-out branch refuses) |
 | WorkspaceService.resolve_workspace | method | roboco/services/workspace.py:745 | Look up agent (UUID or slug) -> team+slug -> workspace path; default team BACKEND |
 | WorkspaceService._lookup_agent_or_raise | method | roboco/services/workspace.py:787 | Find agent by UUID or slug; raise WorkspaceError if missing |
 | WorkspaceService._is_workspace_healthy | staticmethod | roboco/services/workspace.py:806 | True only if .git exists AND has HEAD + objects/ (rejects stub clones) |
@@ -135,7 +136,7 @@ WorkspaceService slice
 +-- WorkspaceError
 +-- WorkspaceService
 |   +-- Path math: get_workspace_path / get_clone_root_path / get_worktree_path
-|   +-- Worktree ops: _clone_root_default_branch / _park_clone_root_off_branch / _worktree_git / _link_shared_venv / ensure_worktree / ensure_worktree_for_resume / _fetch_branch_ref / ensure_worktree_self_heal / remove_worktree
+|   +-- Worktree ops: _clone_root_default_branch / _park_clone_root_off_branch / _worktree_git / _link_shared_venv / ensure_worktree / ensure_worktree_for_resume / _fetch_branch_ref / ensure_worktree_self_heal / remove_worktree / delete_local_branch
 |   +-- Agent lookup: resolve_workspace / _lookup_agent_or_raise
 |   +-- Health + refs: _is_workspace_healthy / _prune_broken_refs / _fetch_origin_best_effort
 |   +-- Token: _resolve_git_token / _read_clone_token
@@ -160,6 +161,7 @@ WorkspaceService slice
 | ensure_worktree_for_resume | roboco/services/workspace.py | GitService._ensure_worktree_for_commit (commit/rebase paths) |
 | ensure_worktree_self_heal | roboco/services/workspace.py | orchestrator._ensure_worktree_before_spawn before -w container launch (replaces the former ensure_worktree_for_resume call there; handles vanished clones + missing branch refs) |
 | remove_worktree | roboco/services/workspace.py | TaskService terminal/cancel paths + claim-rollback (mid-claim failure) |
+| delete_local_branch | roboco/services/workspace.py | TaskService terminal/cancel paths (right after remove_worktree) + GitService.cleanup_stale_branches sweep |
 | ensure_read_clone | roboco/services/workspace.py | ConventionsService.scaffold/effective-map reads (project-level conventions metadata) |
 | dry_upgrade_changes_lockfile | roboco/services/workspace.py | DepUpdateEngine periodic probe loop |
 | fetch_branch_for_inspection | roboco/services/workspace.py | gateway content_actions (QA/Documenter/PM need to read a dev branch) |
@@ -193,6 +195,7 @@ WorkspaceService slice
 - dry_upgrade_changes_lockfile holds the read-clone lock only for the local clone step, then releases it before the upgrade runs. The tiny gap between ensure_read_clone releasing and the probe re-acquiring is safe only because any concurrent _sync_read_clone completes under the lock first — a future change that interleaves could race.
 - get_workspace_path raises WorkspaceError if team is None rather than producing a literal 'None' segment; resolve_workspace falls back to Team.BACKEND when agent.team is falsy — agents missing a team silently land under backend/.
 - fetch_branch_for_inspection reuses workspace_clone_timeout (300s) for a single-branch fetch, not the shorter refresh timeout — a hung remote blocks the QA/Doc verb for 5 minutes.
+- delete_local_branch only detaches the ref; remove_worktree only detaches the worktree. Callers MUST run remove_worktree first — `git branch -d/-D` refuses a branch still checked out elsewhere in the clone (the worktree). Skipping the order silently no-ops the branch delete (check=False swallows the refusal).
 
 
 ## Drift from CLAUDE.md
@@ -217,6 +220,8 @@ WorkspaceService slice
 > Post-snapshot updates (since 2026-06-29): 5 commits touched workspace.py. (1) 9faf2763 [hotfix] strip VIRTUAL_ENV + UV_PROJECT_ENVIRONMENT from _uv_subprocess_env so workspace uv calls stop warning about the image-baked /app/.venv pin. (2) cfe725da [hotfix] worktree: clone root left on the task branch caused fatal "already checked out" on every worktree add re-dispatch — added _clone_root_default_branch + _park_clone_root_off_branch; ensure_worktree and ensure_worktree_for_resume now call _park_clone_root_off_branch before the add to restore the F123 invariant. (3) 536bbb64 (logical-gap sweep PR#286) added _fetch_branch_ref + ensure_worktree_self_heal: the orchestrator's _ensure_worktree_before_spawn now calls ensure_worktree_self_heal instead of bare ensure_worktree_for_resume so a vanished clone (redeploy/disk loss) that left no local branch ref recovers the pushed commits from origin before re-attaching. (4) 3aff6e04 and 15effce0 (gap-fill PRs #285/#283) contributed earlier worktree + dep-probe plumbing (the _clone_local_into / _probe_lockfile_on_clone split already captured in the baseline).
 >
 > Further post-snapshot update (#534, env-branches ladder): `ensure_workspace`'s fresh-clone branch and `ensure_read_clone` both resolve their target branch via `roboco.models.env_branches.head_branch(project)` — the env-ladder's head rung — instead of reading `project.default_branch` directly. A project with no declared ladder resolves to the identical `default_branch` value via the read-time shim, so this is behavior-preserving until the CEO declares a real ladder in the panel.
+>
+> (open PR #548, branch `feature/wave-2-hygiene-charts`, 2026-07-17) Added `delete_local_branch` (line 787) so `TaskService`'s cancel/terminal-completion cleanup and `GitService.cleanup_stale_branches` can reap a spent local branch ref, not just the worktree — previously every task an agent ever claimed leaked a permanent `refs/heads/{branch}` in that agent's clone.
 
 ## Regression Risks
 
diff --git a/docs/rag/architecture/workspaces.md b/docs/rag/architecture/workspaces.md
index bb14b608..7c718faa 100644
--- a/docs/rag/architecture/workspaces.md
+++ b/docs/rag/architecture/workspaces.md
@@ -76,7 +76,7 @@ Your agent clone is **shared across all your tasks**, but each **claimed task**
 - **Git ops split by kind**: checkout/HEAD-moving ops (`create_branch`, `commit`, `rebase`, `checkout`) target the worktree; branch-by-name ops (`push`, `pull`, `fetch`, `pr_merge`, `diff`) run from the clone root. You never do either by hand — the verbs resolve the worktree for you.
 - **One active WorkSession per task** is enforced both in the service layer and by a DB unique index — a re-claim (pool release, reaper unclaim, escalation redirect) supersedes any prior agent's stale session for that task.
 - **Claim rollback** (a mid-claim failure) `worktree remove --force`s the worktree so a retry doesn't collide with a stale one.
-- **Terminal completion** (`complete` / `ceo_approve`) removes the assignee's worktree best-effort, so finished tasks don't accumulate. A `needs_revision` bounce keeps the worktree — you need it back. The stale-claim reaper does **not** remove the worktree; it routes the task to `pending` for a re-claim that reuses it.
+- **Terminal completion** (`complete` / `ceo_approve`) and **cancellation** remove the assignee's worktree AND force-delete the now-spent local branch ref in the clone, so finished/cancelled tasks don't leak either on disk. A `needs_revision` bounce keeps both — you need the branch back. The stale-claim reaper does **not** remove the worktree or branch; it routes the task to `pending` for a re-claim that reuses them. A PM/CEO can also run a backlog stale-branch sweep from the panel's Git page for older completed/cancelled tasks whose ref survived from before this reaping existed.
 
 You do not manage any of this. The verbs do. The only thing you must know: **your cwd is the worktree for your current task, not the clone root** — so relative paths and `uv run` resolve against your task's checkout.
 
diff --git a/panel/src/app/(dashboard)/git/page.tsx b/panel/src/app/(dashboard)/git/page.tsx
index 23976590..00d8626e 100644
--- a/panel/src/app/(dashboard)/git/page.tsx
+++ b/panel/src/app/(dashboard)/git/page.tsx
@@ -1,5 +1,99 @@
-import { GitBrowser } from "@/components/git";
+"use client";
 
+import { Suspense } from "react";
+import { useRouter, useSearchParams } from "next/navigation";
+import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
+import {
+  Tooltip,
+  TooltipContent,
+  TooltipTrigger,
+} from "@/components/ui/tooltip";
+import { Skeleton } from "@/components/ui/skeleton";
+import { GitBrowser } from "@/components/git";
+import { WorkSessionsView } from "@/components/work-sessions";
+
+interface TabDef {
+  value: "repository" | "sessions";
+  label: string;
+  hint: string;
+}
+
+const TAB_DEFS: TabDef[] = [
+  {
+    value: "repository",
+    label: "Repository",
+    hint: "Browse status, branches, log, and diffs; run git actions",
+  },
+  {
+    value: "sessions",
+    label: "Work Sessions",
+    hint: "Active agent work sessions — branch, commits, and PR per task",
+  },
+];
+
+const TAB_VALUES = TAB_DEFS.map((t) => t.value);
+type TabValue = (typeof TAB_VALUES)[number];
+
+function isValidTab(value: string | null): value is TabValue {
+  return TAB_VALUES.includes(value as TabValue);
+}
+
+function GitPageContent() {
+  const router = useRouter();
+  const searchParams = useSearchParams();
+
+  const rawTab = searchParams.get("tab");
+  const activeTab: TabValue = isValidTab(rawTab) ? rawTab : "repository";
+
+  const handleTabChange = (value: string) => {
+    const params = new URLSearchParams(searchParams.toString());
+    params.set("tab", value);
+    router.replace(`/git?${params.toString()}`);
+  };
+
+  return (
+    <Tabs value={activeTab} onValueChange={handleTabChange}>
+      <TabsList>
+        {TAB_DEFS.map((tab) => (
+          <Tooltip key={tab.value}>
+            <TooltipTrigger asChild>
+              {/* TooltipTrigger's asChild Slot merge clobbers TabsTrigger's
+                  own data-state; re-stamp it so the active style survives. */}
+              <TabsTrigger
+                value={tab.value}
+                data-state={tab.value === activeTab ? "active" : "inactive"}
+              >
+                {tab.label}
+              </TabsTrigger>
+            </TooltipTrigger>
+            <TooltipContent>{tab.hint}</TooltipContent>
+          </Tooltip>
+        ))}
+      </TabsList>
+
+      <TabsContent value="repository" className="mt-4">
+        <GitBrowser />
+      </TabsContent>
+
+      <TabsContent value="sessions" className="mt-4">
+        <WorkSessionsView />
+      </TabsContent>
+    </Tabs>
+  );
+}
+
+// Wrap in Suspense for useSearchParams
 export default function GitPage() {
-  return <GitBrowser />;
+  return (
+    <Suspense
+      fallback={
+        <div className="space-y-6">
+          <Skeleton className="h-10 w-64" />
+          <Skeleton className="h-96 w-full" />
+        </div>
+      }
+    >
+      <GitPageContent />
+    </Suspense>
+  );
 }
diff --git a/panel/src/app/(dashboard)/work-sessions/page.tsx b/panel/src/app/(dashboard)/work-sessions/page.tsx
index d346f915..ffbd0570 100644
--- a/panel/src/app/(dashboard)/work-sessions/page.tsx
+++ b/panel/src/app/(dashboard)/work-sessions/page.tsx
@@ -1,157 +1,6 @@
-"use client";
+import { redirect } from "next/navigation";
 
-import { Suspense, useMemo, useCallback, useEffect } from "react";
-import { useSearchParams, useRouter } from "next/navigation";
-import { useWorkSessions } from "@/hooks/use-work-sessions";
-import { WorkSessionStatus } from "@/types";
-import { OfflineState } from "@/components/ui/offline-state";
-import {
-  WorkSessionTable,
-  WorkSessionFilters,
-} from "@/components/work-sessions";
-import { Skeleton } from "@/components/ui/skeleton";
-import { usePageRefresh } from "@/hooks";
-
-function WorkSessionsPageContent() {
-  const router = useRouter();
-  const searchParams = useSearchParams();
-
-  // Read state from URL params
-  const searchQuery = searchParams.get("q") || "";
-  const statusParam = searchParams.get("status");
-  const statusFilter = useMemo(
-    () =>
-      (statusParam?.split(",").filter(Boolean) as WorkSessionStatus[]) || [],
-    [statusParam],
-  );
-
-  // Update URL params
-  const updateParams = useCallback(
-    (updates: Record<string, string | null>) => {
-      const params = new URLSearchParams(searchParams.toString());
-      Object.entries(updates).forEach(([key, value]) => {
-        if (value) {
-          params.set(key, value);
-        } else {
-          params.delete(key);
-        }
-      });
-      const query = params.toString();
-      router.push(query ? `/work-sessions?${query}` : "/work-sessions");
-    },
-    [router, searchParams],
-  );
-
-  const handleSearchChange = useCallback(
-    (value: string) => {
-      updateParams({ q: value || null });
-    },
-    [updateParams],
-  );
-
-  const handleStatusChange = useCallback(
-    (value: WorkSessionStatus[]) => {
-      updateParams({ status: value.length > 0 ? value.join(",") : null });
-    },
-    [updateParams],
-  );
-
-  // Fetch work sessions
-  const { data: sessions, isLoading, error, refetch } = useWorkSessions();
-
-  const { register, unregister, refresh } = usePageRefresh();
-
-  useEffect(() => {
-    const cb = () => {
-      void refetch();
-    };
-    register(cb);
-    return () => unregister(cb);
-  }, [register, unregister, refetch]);
-
-  // Filter sessions client-side for search and multi-select status filter
-  const filteredSessions = useMemo(() => {
-    if (!sessions) return [];
-
-    return sessions.filter((session) => {
-      // Search filter - match branch name
-      if (
-        searchQuery &&
-        !session.branch_name.toLowerCase().includes(searchQuery.toLowerCase())
-      ) {
-        return false;
-      }
-
-      // Status filter (if any selected, session must match one of them)
-      if (statusFilter.length > 0 && !statusFilter.includes(session.status)) {
-        return false;
-      }
-
-      return true;
-    });
-  }, [sessions, searchQuery, statusFilter]);
-
-  // Check if it's a connection error (backend not running)
-  const isOffline =
-    error &&
-    (error.message?.includes("Network Error") ||
-      error.message?.includes("ECONNREFUSED") ||
-      (error as { code?: string })?.code === "ERR_NETWORK");
-
-  return (
-    <div className="space-y-6">
-      {/* Header */}
-      <div className="flex items-center justify-between">
-        <div>
-          <h1 className="text-3xl font-bold tracking-tight">Work Sessions</h1>
-          <p className="text-muted-foreground">
-            Track git branches and pull requests for active work
-          </p>
-        </div>
-      </div>
-
-      {/* Filters - Sticky */}
-      <div className="sticky top-0 z-10 -mx-6 px-6 py-2 bg-muted/30 backdrop-blur-sm">
-        <WorkSessionFilters
-          searchQuery={searchQuery}
-          onSearchChange={handleSearchChange}
-          statusFilter={statusFilter}
-          onStatusChange={handleStatusChange}
-        />
-      </div>
-
-      {/* Content */}
-      {isOffline ? (
-        <OfflineState
-          title="Cannot Load Work Sessions"
-          description="Start the RoboCo orchestrator to view work sessions. Work sessions track agent activity on git branches."
-          onRetry={() => void refresh()}
-        />
-      ) : (
-        <WorkSessionTable sessions={filteredSessions} isLoading={isLoading} />
-      )}
-    </div>
-  );
-}
-
-// Wrap in Suspense for useSearchParams
+// The work-sessions surface moved under /git as its "Work Sessions" tab.
 export default function WorkSessionsPage() {
-  return (
-    <Suspense
-      fallback={
-        <div className="space-y-6">
-          <div className="flex items-center justify-between">
-            <div>
-              <Skeleton className="h-9 w-48 mb-2" />
-              <Skeleton className="h-5 w-72" />
-            </div>
-          </div>
-          <Skeleton className="h-12 w-full" />
-          <Skeleton className="h-96 w-full" />
-        </div>
-      }
-    >
-      <WorkSessionsPageContent />
-    </Suspense>
-  );
+  redirect("/git?tab=sessions");
 }
diff --git a/panel/src/components/business/__tests__/company-scorecard-card.test.tsx b/panel/src/components/business/__tests__/company-scorecard-card.test.tsx
index da0e4db2..80395e13 100644
--- a/panel/src/components/business/__tests__/company-scorecard-card.test.tsx
+++ b/panel/src/components/business/__tests__/company-scorecard-card.test.tsx
@@ -26,6 +26,17 @@ vi.mock("@/lib/api/cockpit", () => ({
   },
 }));
 
+// The spend trend chart pulls its own series via useUsageTimeSeries — a
+// hook-level mock (not the raw react-query one above, which only controls
+// the single cockpit-summary useQuery call) so SpendTrendChart never sees
+// the mocked CockpitSummary object where it expects an array.
+vi.mock("@/hooks/use-usage", () => ({
+  useUsageTimeSeries: () => ({
+    data: [],
+    isLoading: false,
+  }),
+}));
+
 // ---------------------------------------------------------------------------
 // Import component AFTER mocks are set up
 // ---------------------------------------------------------------------------
@@ -160,6 +171,17 @@ describe("CompanyScorecardCard", () => {
     expect(screen.getByText("Done (30 d)")).toBeInTheDocument();
   });
 
+  // -------------------------------------------------------------------------
+  // The spend-trend chart is wired into the Spend section
+  // -------------------------------------------------------------------------
+  it("renders the daily spend trend chart alongside the spend summary", () => {
+    setQueryState({ data: buildSummary() });
+
+    render(<CompanyScorecardCard />);
+
+    expect(screen.getByText("Daily Spend (30d)")).toBeInTheDocument();
+  });
+
   // -------------------------------------------------------------------------
   // AC2 Scenario 4: Spend — 'No budget cap set' when cap is null
   // -------------------------------------------------------------------------
diff --git a/panel/src/components/business/__tests__/spend-trend-chart.test.tsx b/panel/src/components/business/__tests__/spend-trend-chart.test.tsx
new file mode 100644
index 00000000..96ecdb2a
--- /dev/null
+++ b/panel/src/components/business/__tests__/spend-trend-chart.test.tsx
@@ -0,0 +1,37 @@
+import { describe, it, expect } from "vitest";
+import { render, screen } from "@testing-library/react";
+import { SpendTrendChart } from "../spend-trend-chart";
+import type { UsageTimePoint } from "@/types";
+
+function buildPoint(overrides: Partial<UsageTimePoint> = {}): UsageTimePoint {
+  return {
+    bucket: new Date().toISOString(),
+    tokens_input: 1000,
+    tokens_output: 500,
+    total_tokens: 1500,
+    cost_usd: 4.56,
+    ...overrides,
+  };
+}
+
+describe("SpendTrendChart", () => {
+  it("renders the card title", () => {
+    render(<SpendTrendChart data={[buildPoint()]} isLoading={false} />);
+    expect(screen.getByText("Daily Spend (30d)")).toBeInTheDocument();
+  });
+
+  it("shows an empty state when there is no data", () => {
+    render(<SpendTrendChart data={[]} isLoading={false} />);
+    expect(screen.getByText("No spend data")).toBeInTheDocument();
+  });
+
+  it("shows an empty state when data is undefined", () => {
+    render(<SpendTrendChart data={undefined} isLoading={false} />);
+    expect(screen.getByText("No spend data")).toBeInTheDocument();
+  });
+
+  it("does not show the empty state while loading", () => {
+    render(<SpendTrendChart data={[]} isLoading />);
+    expect(screen.queryByText("No spend data")).not.toBeInTheDocument();
+  });
+});
diff --git a/panel/src/components/business/company-scorecard-card.tsx b/panel/src/components/business/company-scorecard-card.tsx
index 2e56fac5..7547bbe6 100644
--- a/panel/src/components/business/company-scorecard-card.tsx
+++ b/panel/src/components/business/company-scorecard-card.tsx
@@ -12,6 +12,9 @@ import {
 import { Skeleton } from "@/components/ui/skeleton";
 import { OfflineState } from "@/components/ui/offline-state";
 import { HelpTip } from "@/components/ui/help-tip";
+import { useUsageTimeSeries } from "@/hooks/use-usage";
+import { SpendTrendChart } from "./spend-trend-chart";
+import type { UsageTimePoint } from "@/types";
 
 // ---------------------------------------------------------------------------
 // Loading skeleton — three grouped skeleton blocks
@@ -131,9 +134,15 @@ function DeliverySection({ delivery }: DeliverySectionProps) {
 
 interface SpendSectionProps {
   spend: CockpitSummary["spend"];
+  spendTrend: UsageTimePoint[] | undefined;
+  spendTrendLoading: boolean;
 }
 
-function SpendSection({ spend }: SpendSectionProps) {
+function SpendSection({
+  spend,
+  spendTrend,
+  spendTrendLoading,
+}: SpendSectionProps) {
   const {
     monthly_budget_cap_usd,
     spend_30d_usd,
@@ -190,6 +199,7 @@ function SpendSection({ spend }: SpendSectionProps) {
           )}
         </div>
       </div>
+      <SpendTrendChart data={spendTrend} isLoading={spendTrendLoading} />
     </div>
   );
 }
@@ -266,9 +276,15 @@ function StubObjectivesSection() {
 
 interface ScorecardBodyProps {
   data: CockpitSummary;
+  spendTrend: UsageTimePoint[] | undefined;
+  spendTrendLoading: boolean;
 }
 
-function ScorecardBody({ data }: ScorecardBodyProps) {
+function ScorecardBody({
+  data,
+  spendTrend,
+  spendTrendLoading,
+}: ScorecardBodyProps) {
   return (
     <Card>
       <CardHeader>
@@ -277,7 +293,11 @@ function ScorecardBody({ data }: ScorecardBodyProps) {
       </CardHeader>
       <CardContent className="space-y-6">
         <DeliverySection delivery={data.delivery} />
-        <SpendSection spend={data.spend} />
+        <SpendSection
+          spend={data.spend}
+          spendTrend={spendTrend}
+          spendTrendLoading={spendTrendLoading}
+        />
         <SpeedSection medianLeadTimeHours={data.median_lead_time_hours} />
         <StubObjectivesSection />
       </CardContent>
@@ -294,6 +314,8 @@ export function CompanyScorecardCard() {
     queryKey: ["cockpit-summary"],
     queryFn: cockpitApi.summary,
   });
+  const { data: spendTrend, isLoading: spendTrendLoading } =
+    useUsageTimeSeries("30d");
 
   if (isLoading) return <ScorecardSkeleton />;
 
@@ -307,5 +329,11 @@ export function CompanyScorecardCard() {
     );
   }
 
-  return <ScorecardBody data={data} />;
+  return (
+    <ScorecardBody
+      data={data}
+      spendTrend={spendTrend}
+      spendTrendLoading={spendTrendLoading}
+    />
+  );
 }
diff --git a/panel/src/components/business/spend-trend-chart.tsx b/panel/src/components/business/spend-trend-chart.tsx
new file mode 100644
index 00000000..15d5d0b2
--- /dev/null
+++ b/panel/src/components/business/spend-trend-chart.tsx
@@ -0,0 +1,91 @@
+"use client";
+
+import {
+  BarChart,
+  Bar,
+  XAxis,
+  YAxis,
+  CartesianGrid,
+  Tooltip,
+  ResponsiveContainer,
+} from "recharts";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Skeleton } from "@/components/ui/skeleton";
+import { HelpTip } from "@/components/ui/help-tip";
+import type { UsageTimePoint } from "@/types";
+
+interface SpendTrendChartProps {
+  data: UsageTimePoint[] | undefined;
+  isLoading: boolean;
+}
+
+function formatBucket(bucket: string): string {
+  const d = new Date(bucket);
+  return d.getMonth() + 1 + "/" + d.getDate();
+}
+
+function fmtCost(n: number): string {
+  return "$" + n.toFixed(2);
+}
+
+/**
+ * Daily-spend breakdown behind the Scorecard's "30-day spend" figure —
+ * reuses GET /usage/time-series (period=30d, daily buckets), the same
+ * series-shaped endpoint the Overview page's CostTrendChart draws from.
+ */
+export function SpendTrendChart({ data, isLoading }: SpendTrendChartProps) {
+  const chartData = (data ?? []).map((p) => ({
+    day: formatBucket(p.bucket),
+    Spend: p.cost_usd,
+  }));
+
+  return (
+    <Card>
+      <CardHeader className="pb-2">
+        <HelpTip label="Provider-priced agent-session cost per day over the trailing 30 days — the daily breakdown behind the 30-day spend total above">
+          <CardTitle className="text-base">Daily Spend (30d)</CardTitle>
+        </HelpTip>
+      </CardHeader>
+      <CardContent>
+        {isLoading ? (
+          <Skeleton className="h-40 w-full" />
+        ) : chartData.length === 0 ? (
+          <p className="text-sm text-muted-foreground text-center py-10">
+            No spend data
+          </p>
+        ) : (
+          <ResponsiveContainer width="100%" height={160}>
+            <BarChart
+              data={chartData}
+              margin={{ top: 4, right: 8, left: 0, bottom: 0 }}
+            >
+              <CartesianGrid strokeDasharray="3 3" className="opacity-20" />
+              <XAxis
+                dataKey="day"
+                tick={{ fontSize: 9 }}
+                interval={4}
+                axisLine={false}
+                tickLine={false}
+              />
+              <YAxis
+                tickFormatter={fmtCost}
+                tick={{ fontSize: 10 }}
+                axisLine={false}
+                tickLine={false}
+                width={44}
+              />
+              <Tooltip
+                formatter={(value) => [
+                  fmtCost(typeof value === "number" ? value : 0),
+                  "Spend",
+                ]}
+                contentStyle={{ fontSize: 12 }}
+              />
+              <Bar dataKey="Spend" fill="var(--chart-3)" radius={[3, 3, 0, 0]} />
+            </BarChart>
+          </ResponsiveContainer>
+        )}
+      </CardContent>
+    </Card>
+  );
+}
diff --git a/panel/src/components/dashboard/__tests__/command-center.test.tsx b/panel/src/components/dashboard/__tests__/command-center.test.tsx
index f4ff84be..ca09b5c1 100644
--- a/panel/src/components/dashboard/__tests__/command-center.test.tsx
+++ b/panel/src/components/dashboard/__tests__/command-center.test.tsx
@@ -32,6 +32,13 @@ vi.mock("@/hooks/use-tasks", () => ({
     refetch: vi.fn(),
   }),
 }));
+vi.mock("@/hooks/use-usage", () => ({
+  useUsageTimeSeries: () => ({
+    data: undefined,
+    isLoading: false,
+    refetch: vi.fn(),
+  }),
+}));
 
 vi.mock("../team-health-cards", () => ({
   TeamHealthCards: () => <div>TeamHealthCardsStub</div>,
@@ -87,6 +94,9 @@ vi.mock("../usage-overview-panel", () => ({
 vi.mock("../scorecard-overview-panel", () => ({
   ScorecardOverviewPanel: () => <div>ScorecardOverviewPanelStub</div>,
 }));
+vi.mock("../cost-trend-chart", () => ({
+  CostTrendChart: () => <div>CostTrendChartStub</div>,
+}));
 
 import { CommandCenter } from "../command-center";
 
@@ -106,6 +116,7 @@ describe("CommandCenter", () => {
       "AuditorAlertsPanelStub",
       "UsageOverviewPanelStub",
       "ScorecardOverviewPanelStub",
+      "CostTrendChartStub",
       "TeamHealthCardsStub",
       "CeoApprovalQueueStub",
       "StrategySignalsPanelStub",
diff --git a/panel/src/components/dashboard/__tests__/cost-trend-chart.test.tsx b/panel/src/components/dashboard/__tests__/cost-trend-chart.test.tsx
new file mode 100644
index 00000000..073bacbc
--- /dev/null
+++ b/panel/src/components/dashboard/__tests__/cost-trend-chart.test.tsx
@@ -0,0 +1,37 @@
+import { describe, it, expect } from "vitest";
+import { render, screen } from "@testing-library/react";
+import { CostTrendChart } from "../cost-trend-chart";
+import type { UsageTimePoint } from "@/types";
+
+function buildPoint(overrides: Partial<UsageTimePoint> = {}): UsageTimePoint {
+  return {
+    bucket: new Date().toISOString(),
+    tokens_input: 1000,
+    tokens_output: 500,
+    total_tokens: 1500,
+    cost_usd: 1.23,
+    ...overrides,
+  };
+}
+
+describe("CostTrendChart", () => {
+  it("renders the card title", () => {
+    render(<CostTrendChart data={[buildPoint()]} isLoading={false} />);
+    expect(screen.getByText("Spend Trend (7d)")).toBeInTheDocument();
+  });
+
+  it("shows an empty state when there is no data", () => {
+    render(<CostTrendChart data={[]} isLoading={false} />);
+    expect(screen.getByText("No usage data")).toBeInTheDocument();
+  });
+
+  it("shows an empty state when data is undefined", () => {
+    render(<CostTrendChart data={undefined} isLoading={false} />);
+    expect(screen.getByText("No usage data")).toBeInTheDocument();
+  });
+
+  it("does not show the empty state while loading", () => {
+    render(<CostTrendChart data={[]} isLoading />);
+    expect(screen.queryByText("No usage data")).not.toBeInTheDocument();
+  });
+});
diff --git a/panel/src/components/dashboard/command-center.tsx b/panel/src/components/dashboard/command-center.tsx
index 5961b971..a44ec93d 100644
--- a/panel/src/components/dashboard/command-center.tsx
+++ b/panel/src/components/dashboard/command-center.tsx
@@ -7,6 +7,7 @@ import {
   useRecentActivity,
 } from "@/hooks/use-dashboard";
 import { useTasks } from "@/hooks/use-tasks";
+import { useUsageTimeSeries } from "@/hooks/use-usage";
 import { usePageRefresh } from "@/hooks";
 import { TeamHealthCards } from "./team-health-cards";
 import { KeyMetricsPanel } from "./key-metrics-panel";
@@ -25,6 +26,7 @@ import type { Activity } from "./activity-item";
 import { Button } from "@/components/ui/button";
 import { UsageOverviewPanel } from "./usage-overview-panel";
 import { ScorecardOverviewPanel } from "./scorecard-overview-panel";
+import { CostTrendChart } from "./cost-trend-chart";
 import {
   Tooltip,
   TooltipContent,
@@ -62,6 +64,11 @@ export function CommandCenter() {
     isError: errorActivity,
     refetch: refetchActivity,
   } = useRecentActivity(24);
+  const {
+    data: costTrend,
+    isLoading: loadingCostTrend,
+    refetch: refetchCostTrend,
+  } = useUsageTimeSeries("7d");
 
   const { register, unregister } = usePageRefresh();
 
@@ -79,6 +86,9 @@ export function CommandCenter() {
       () => {
         void refetchActivity();
       },
+      () => {
+        void refetchCostTrend();
+      },
     ];
     callbacks.forEach((cb) => register(cb));
     return () => {
@@ -91,6 +101,7 @@ export function CommandCenter() {
     refetchFlags,
     refetchTasks,
     refetchActivity,
+    refetchCostTrend,
   ]);
 
   const hasError = errorOverview || errorFlags || errorTasks || errorActivity;
@@ -156,6 +167,8 @@ export function CommandCenter() {
         <ScorecardOverviewPanel />
       </div>
 
+      <CostTrendChart data={costTrend} isLoading={loadingCostTrend} />
+
       {/* Section 2: Team Health (team cards + Task Intake + Secretary) */}
       <section>
         <HelpTip label="Per-team blocked ratio and throughput, plus the on-demand agents">
diff --git a/panel/src/components/dashboard/cost-trend-chart.tsx b/panel/src/components/dashboard/cost-trend-chart.tsx
new file mode 100644
index 00000000..ea4549b0
--- /dev/null
+++ b/panel/src/components/dashboard/cost-trend-chart.tsx
@@ -0,0 +1,109 @@
+"use client";
+
+import {
+  AreaChart,
+  Area,
+  XAxis,
+  YAxis,
+  CartesianGrid,
+  Tooltip,
+  ResponsiveContainer,
+} from "recharts";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Skeleton } from "@/components/ui/skeleton";
+import { HelpTip } from "@/components/ui/help-tip";
+import type { UsageTimePoint } from "@/types";
+
+interface CostTrendChartProps {
+  data: UsageTimePoint[] | undefined;
+  isLoading: boolean;
+}
+
+function formatBucket(bucket: string): string {
+  const d = new Date(bucket);
+  return d.getMonth() + 1 + "/" + d.getDate();
+}
+
+function fmtCost(n: number): string {
+  return "$" + n.toFixed(2);
+}
+
+/**
+ * Compact daily spend trend for the Command Center landing page — reuses
+ * GET /usage/time-series (period=7d, daily buckets) so the CEO sees where
+ * the current-period totals in UsageOverviewPanel came from at a glance.
+ */
+export function CostTrendChart({ data, isLoading }: CostTrendChartProps) {
+  const chartData = (data ?? []).map((p) => ({
+    day: formatBucket(p.bucket),
+    Cost: p.cost_usd,
+  }));
+
+  return (
+    <Card>
+      <CardHeader className="pb-2">
+        <HelpTip label="Provider-priced agent-session cost per day over the last 7 days">
+          <CardTitle className="text-base">Spend Trend (7d)</CardTitle>
+        </HelpTip>
+      </CardHeader>
+      <CardContent>
+        {isLoading ? (
+          <Skeleton className="h-40 w-full" />
+        ) : chartData.length === 0 ? (
+          <p className="text-sm text-muted-foreground text-center py-10">
+            No usage data
+          </p>
+        ) : (
+          <ResponsiveContainer width="100%" height={160}>
+            <AreaChart
+              data={chartData}
+              margin={{ top: 4, right: 8, left: 0, bottom: 0 }}
+            >
+              <defs>
+                <linearGradient id="fillCost" x1="0" y1="0" x2="0" y2="1">
+                  <stop
+                    offset="5%"
+                    stopColor="var(--chart-3)"
+                    stopOpacity={0.8}
+                  />
+                  <stop
+                    offset="95%"
+                    stopColor="var(--chart-3)"
+                    stopOpacity={0.1}
+                  />
+                </linearGradient>
+              </defs>
+              <CartesianGrid strokeDasharray="3 3" className="opacity-20" />
+              <XAxis
+                dataKey="day"
+                tick={{ fontSize: 10 }}
+                axisLine={false}
+                tickLine={false}
+              />
+              <YAxis
+                tickFormatter={fmtCost}
+                tick={{ fontSize: 10 }}
+                axisLine={false}
+                tickLine={false}
+                width={44}
+              />
+              <Tooltip
+                formatter={(value) => [
+                  fmtCost(typeof value === "number" ? value : 0),
+                  "Cost",
+                ]}
+                contentStyle={{ fontSize: 12 }}
+              />
+              <Area
+                type="monotone"
+                dataKey="Cost"
+                stroke="var(--chart-3)"
+                fill="url(#fillCost)"
+              />
+            </AreaChart>
+          </ResponsiveContainer>
+        )}
+      </CardContent>
+    </Card>
+  );
+}
diff --git a/panel/src/components/git/git-actions-panel.tsx b/panel/src/components/git/git-actions-panel.tsx
index f24f99ca..ee8bba64 100644
--- a/panel/src/components/git/git-actions-panel.tsx
+++ b/panel/src/components/git/git-actions-panel.tsx
@@ -36,6 +36,7 @@ import {
   Download,
   RefreshCcw,
   GitGraph,
+  Trash2,
 } from "lucide-react";
 import { HelpTip } from "@/components/ui/help-tip";
 
@@ -51,6 +52,7 @@ interface GitActionsPanelProps {
   onPull: () => void;
   onFetch: () => void;
   onRebase: (targetBranch: string) => void;
+  onCleanupBranches: () => void;
   isCommitting: boolean;
   isPushing: boolean;
   isCreatingPR: boolean;
@@ -58,6 +60,7 @@ interface GitActionsPanelProps {
   isPulling: boolean;
   isFetching: boolean;
   isRebasing: boolean;
+  isCleaningUpBranches: boolean;
 }
 
 export function GitActionsPanel({
@@ -72,6 +75,7 @@ export function GitActionsPanel({
   onPull,
   onFetch,
   onRebase,
+  onCleanupBranches,
   isCommitting,
   isPushing,
   isCreatingPR,
@@ -79,6 +83,7 @@ export function GitActionsPanel({
   isPulling,
   isFetching,
   isRebasing,
+  isCleaningUpBranches,
 }: GitActionsPanelProps) {
   void _agentId; // Reserved for future use
   const [showCommitDialog, setShowCommitDialog] = useState(false);
@@ -513,6 +518,48 @@ export function GitActionsPanel({
           </AlertDialogContent>
         </AlertDialog>
 
+        {/* Cleanup Stale Branches — destructive, requires confirmation */}
+        <AlertDialog>
+          <HelpTip label="Deletes the remote + local branch of every completed/cancelled task in this project. Never touches the default branch or an environment-ladder rung (head/qa/stag/prod).">
+            <span className="block w-full">
+              <AlertDialogTrigger asChild>
+                <Button
+                  className="w-full justify-start"
+                  variant="outline"
+                  disabled={isCleaningUpBranches}
+                >
+                  {isCleaningUpBranches ? (
+                    <RefreshCw className="h-4 w-4 mr-2 animate-spin" />
+                  ) : (
+                    <Trash2 className="h-4 w-4 mr-2" />
+                  )}
+                  Clean Up Stale Branches
+                </Button>
+              </AlertDialogTrigger>
+            </span>
+          </HelpTip>
+          <AlertDialogContent className="border-destructive bg-destructive/5">
+            <AlertDialogHeader>
+              <AlertDialogTitle>Clean up stale branches?</AlertDialogTitle>
+              <AlertDialogDescription>
+                Deletes the remote + local branch of every completed or
+                cancelled task in <strong>{projectSlug}</strong>. The default
+                branch and every environment-ladder rung are always skipped.
+                This action cannot be undone.
+              </AlertDialogDescription>
+            </AlertDialogHeader>
+            <AlertDialogFooter>
+              <AlertDialogCancel>Cancel</AlertDialogCancel>
+              <AlertDialogAction
+                className="bg-destructive text-destructive-foreground hover:bg-destructive/90"
+                onClick={onCleanupBranches}
+              >
+                Clean Up
+              </AlertDialogAction>
+            </AlertDialogFooter>
+          </AlertDialogContent>
+        </AlertDialog>
+
         {/* Status Summary */}
         {status && (
           <div className="pt-2 border-t text-xs text-muted-foreground space-y-1">
diff --git a/panel/src/components/git/git-browser.tsx b/panel/src/components/git/git-browser.tsx
index 702a99e1..65458bc6 100644
--- a/panel/src/components/git/git-browser.tsx
+++ b/panel/src/components/git/git-browser.tsx
@@ -48,6 +48,7 @@ function GitBrowserContent() {
     handlePull,
     handleFetch,
     handleRebase,
+    handleCleanupBranches,
     isCommitting,
     isPushing,
     isCreatingPR,
@@ -57,6 +58,7 @@ function GitBrowserContent() {
     isRebasing,
     isCheckingOut,
     isCreatingBranch,
+    isCleaningUpBranches,
   } = useGitBrowser();
 
   if (isOffline) {
@@ -139,6 +141,7 @@ function GitBrowserContent() {
               onPull={handlePull}
               onFetch={handleFetch}
               onRebase={handleRebase}
+              onCleanupBranches={handleCleanupBranches}
               isCommitting={isCommitting}
               isPushing={isPushing}
               isCreatingPR={isCreatingPR}
@@ -146,6 +149,7 @@ function GitBrowserContent() {
               isPulling={isPulling}
               isFetching={isFetching}
               isRebasing={isRebasing}
+              isCleaningUpBranches={isCleaningUpBranches}
             />
           </div>
 
diff --git a/panel/src/components/work-sessions/__tests__/session-trend-chart.test.tsx b/panel/src/components/work-sessions/__tests__/session-trend-chart.test.tsx
new file mode 100644
index 00000000..e86efea7
--- /dev/null
+++ b/panel/src/components/work-sessions/__tests__/session-trend-chart.test.tsx
@@ -0,0 +1,39 @@
+import { describe, it, expect } from "vitest";
+import { render, screen } from "@testing-library/react";
+import { SessionTrendChart } from "../session-trend-chart";
+import { WorkSessionStatus } from "@/types";
+import type { WorkSessionSummary } from "@/types";
+
+function buildSession(overrides: Partial<WorkSessionSummary> = {}): WorkSessionSummary {
+  return {
+    id: "session-1",
+    task_id: "11111111-1111-1111-1111-111111111111",
+    branch_name: "feature/backend/ABC12345",
+    status: WorkSessionStatus.ACTIVE,
+    started_at: new Date().toISOString(),
+    has_pr: false,
+    ...overrides,
+  };
+}
+
+describe("SessionTrendChart", () => {
+  it("renders the card title", () => {
+    render(<SessionTrendChart sessions={[buildSession()]} isLoading={false} />);
+    expect(screen.getByText("Active Session Starts")).toBeInTheDocument();
+  });
+
+  it("shows an empty state when there are no sessions", () => {
+    render(<SessionTrendChart sessions={[]} isLoading={false} />);
+    expect(screen.getByText("No active sessions")).toBeInTheDocument();
+  });
+
+  it("shows an empty state when sessions is undefined", () => {
+    render(<SessionTrendChart sessions={undefined} isLoading={false} />);
+    expect(screen.getByText("No active sessions")).toBeInTheDocument();
+  });
+
+  it("does not show the empty state while loading", () => {
+    render(<SessionTrendChart sessions={[]} isLoading />);
+    expect(screen.queryByText("No active sessions")).not.toBeInTheDocument();
+  });
+});
diff --git a/panel/src/components/work-sessions/index.ts b/panel/src/components/work-sessions/index.ts
index aac10946..c153b233 100644
--- a/panel/src/components/work-sessions/index.ts
+++ b/panel/src/components/work-sessions/index.ts
@@ -1,2 +1,4 @@
 export { WorkSessionTable } from "./work-session-table";
 export { WorkSessionFilters } from "./work-session-filters";
+export { SessionTrendChart } from "./session-trend-chart";
+export { WorkSessionsView } from "./work-sessions-view";
diff --git a/panel/src/components/work-sessions/session-trend-chart.tsx b/panel/src/components/work-sessions/session-trend-chart.tsx
new file mode 100644
index 00000000..f0517d78
--- /dev/null
+++ b/panel/src/components/work-sessions/session-trend-chart.tsx
@@ -0,0 +1,128 @@
+"use client";
+
+import { useMemo } from "react";
+import {
+  BarChart,
+  Bar,
+  XAxis,
+  YAxis,
+  CartesianGrid,
+  Tooltip,
+  ResponsiveContainer,
+} from "recharts";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Skeleton } from "@/components/ui/skeleton";
+import { HelpTip } from "@/components/ui/help-tip";
+import type { WorkSessionSummary } from "@/types";
+
+interface SessionTrendChartProps {
+  sessions: WorkSessionSummary[] | undefined;
+  isLoading: boolean;
+}
+
+const HOURLY_SPAN_MS = 36 * 60 * 60 * 1000;
+
+interface Bucket {
+  key: string;
+  label: string;
+  count: number;
+}
+
+/**
+ * Buckets session `started_at` timestamps by hour (span <= 36h) or by day
+ * (wider span), mirroring the hourly/daily switch usage-time-series-chart
+ * applies for its period-selected data.
+ */
+function bucketSessions(sessions: WorkSessionSummary[]): Bucket[] {
+  if (sessions.length === 0) return [];
+
+  const times = sessions.map((s) => new Date(s.started_at).getTime());
+  const spanMs = Math.max(...times) - Math.min(...times);
+  const hourly = spanMs <= HOURLY_SPAN_MS;
+
+  const counts = new Map<string, number>();
+  for (const s of sessions) {
+    const d = new Date(s.started_at);
+    const key = hourly
+      ? `${d.getFullYear()}-${d.getMonth()}-${d.getDate()}-${d.getHours()}`
+      : `${d.getFullYear()}-${d.getMonth()}-${d.getDate()}`;
+    counts.set(key, (counts.get(key) ?? 0) + 1);
+  }
+
+  const buckets: Bucket[] = Array.from(counts.entries()).map(([key, count]) => {
+    const [y, m, day, hour] = key.split("-").map(Number);
+    const d = new Date(y, m, day, hour ?? 0);
+    const label = hourly
+      ? d.getHours().toString().padStart(2, "0") + ":00"
+      : d.getMonth() + 1 + "/" + d.getDate();
+    return { key, label, count };
+  });
+
+  buckets.sort((a, b) => a.key.localeCompare(b.key));
+  return buckets;
+}
+
+/**
+ * Session-start volume trend for the Work Sessions page. `GET /work-sessions`
+ * (unfiltered, as this page calls it) returns only currently ACTIVE sessions
+ * — there is no tokens/cost/duration field on WorkSessionSummary (that data
+ * lives in agent_spawn_sessions, a different table) and no historical depth
+ * beyond whatever is active right now. So this charts what's honestly here:
+ * a start-time distribution of the active sessions already on the page,
+ * labeled accordingly rather than presented as a full history.
+ */
+export function SessionTrendChart({
+  sessions,
+  isLoading,
+}: SessionTrendChartProps) {
+  const buckets = useMemo(() => bucketSessions(sessions ?? []), [sessions]);
+
+  return (
+    <Card>
+      <CardHeader className="pb-2">
+        <HelpTip label="When today's currently active work sessions began, bucketed by hour or day — this list only ever shows active sessions, not full session history">
+          <CardTitle className="text-base">Active Session Starts</CardTitle>
+        </HelpTip>
+      </CardHeader>
+      <CardContent>
+        {isLoading ? (
+          <Skeleton className="h-52 w-full" />
+        ) : buckets.length === 0 ? (
+          <p className="text-sm text-muted-foreground text-center py-12">
+            No active sessions
+          </p>
+        ) : (
+          <ResponsiveContainer width="100%" height={208}>
+            <BarChart
+              data={buckets}
+              margin={{ top: 4, right: 8, left: 0, bottom: 0 }}
+            >
+              <CartesianGrid strokeDasharray="3 3" className="opacity-20" />
+              <XAxis
+                dataKey="label"
+                tick={{ fontSize: 10 }}
+                axisLine={false}
+                tickLine={false}
+              />
+              <YAxis
+                allowDecimals={false}
+                tick={{ fontSize: 10 }}
+                axisLine={false}
+                tickLine={false}
+                width={28}
+              />
+              <Tooltip
+                formatter={(value) => [
+                  typeof value === "number" ? value : 0,
+                  "Sessions started",
+                ]}
+                contentStyle={{ fontSize: 12 }}
+              />
+              <Bar dataKey="count" fill="var(--chart-1)" radius={[3, 3, 0, 0]} />
+            </BarChart>
+          </ResponsiveContainer>
+        )}
+      </CardContent>
+    </Card>
+  );
+}
diff --git a/panel/src/components/work-sessions/work-sessions-view.tsx b/panel/src/components/work-sessions/work-sessions-view.tsx
new file mode 100644
index 00000000..72280943
--- /dev/null
+++ b/panel/src/components/work-sessions/work-sessions-view.tsx
@@ -0,0 +1,104 @@
+"use client";
+
+import { useMemo, useState, useEffect } from "react";
+import { useWorkSessions } from "@/hooks/use-work-sessions";
+import { WorkSessionStatus } from "@/types";
+import { OfflineState } from "@/components/ui/offline-state";
+import { WorkSessionTable } from "./work-session-table";
+import { WorkSessionFilters } from "./work-session-filters";
+import { SessionTrendChart } from "./session-trend-chart";
+import { usePageRefresh } from "@/hooks";
+
+/**
+ * Work-sessions content, rendered as the "Work Sessions" tab of /git.
+ * Filter state is LOCAL, deliberately not URL params: every URL write forks
+ * ScrollRestoration's route key and force-scrolls <main> to top, so a
+ * per-keystroke q= param made typing in the search box bounce the page.
+ */
+export function WorkSessionsView() {
+  const [searchQuery, setSearchQuery] = useState("");
+  const [statusFilter, setStatusFilter] = useState<WorkSessionStatus[]>([]);
+
+  const handleSearchChange = setSearchQuery;
+  const handleStatusChange = setStatusFilter;
+
+  // Fetch work sessions
+  const { data: sessions, isLoading, error, refetch } = useWorkSessions();
+
+  const { register, unregister, refresh } = usePageRefresh();
+
+  useEffect(() => {
+    const cb = () => {
+      void refetch();
+    };
+    register(cb);
+    return () => unregister(cb);
+  }, [register, unregister, refetch]);
+
+  // Filter sessions client-side for search and multi-select status filter
+  const filteredSessions = useMemo(() => {
+    if (!sessions) return [];
+
+    return sessions.filter((session) => {
+      // Search filter - match branch name
+      if (
+        searchQuery &&
+        !session.branch_name.toLowerCase().includes(searchQuery.toLowerCase())
+      ) {
+        return false;
+      }
+
+      // Status filter (if any selected, session must match one of them)
+      if (statusFilter.length > 0 && !statusFilter.includes(session.status)) {
+        return false;
+      }
+
+      return true;
+    });
+  }, [sessions, searchQuery, statusFilter]);
+
+  // Check if it's a connection error (backend not running)
+  const isOffline =
+    error &&
+    (error.message?.includes("Network Error") ||
+      error.message?.includes("ECONNREFUSED") ||
+      (error as { code?: string })?.code === "ERR_NETWORK");
+
+  return (
+    <div className="space-y-6">
+      {/* Header */}
+      <div className="flex items-center justify-between">
+        <div>
+          <h1 className="text-3xl font-bold tracking-tight">Work Sessions</h1>
+          <p className="text-muted-foreground">
+            Track git branches and pull requests for active work
+          </p>
+        </div>
+      </div>
+
+      {/* Filters - Sticky */}
+      <div className="sticky top-0 z-10 -mx-6 px-6 py-2 bg-muted/30 backdrop-blur-sm">
+        <WorkSessionFilters
+          searchQuery={searchQuery}
+          onSearchChange={handleSearchChange}
+          statusFilter={statusFilter}
+          onStatusChange={handleStatusChange}
+        />
+      </div>
+
+      {/* Content */}
+      {isOffline ? (
+        <OfflineState
+          title="Cannot Load Work Sessions"
+          description="Start the RoboCo orchestrator to view work sessions. Work sessions track agent activity on git branches."
+          onRetry={() => void refresh()}
+        />
+      ) : (
+        <>
+          <SessionTrendChart sessions={filteredSessions} isLoading={isLoading} />
+          <WorkSessionTable sessions={filteredSessions} isLoading={isLoading} />
+        </>
+      )}
+    </div>
+  );
+}
diff --git a/panel/src/hooks/__tests__/use-git-browser.test.tsx b/panel/src/hooks/__tests__/use-git-browser.test.tsx
index 026dbe99..f48d926b 100644
--- a/panel/src/hooks/__tests__/use-git-browser.test.tsx
+++ b/panel/src/hooks/__tests__/use-git-browser.test.tsx
@@ -73,6 +73,7 @@ function buildMutations(overrides: Record<string, unknown> = {}) {
     pull: { mutateAsync: vi.fn(), isPending: false },
     fetch: { mutateAsync: vi.fn(), isPending: false },
     rebase: { mutateAsync: vi.fn(), isPending: false },
+    cleanupBranches: { mutateAsync: vi.fn(), isPending: false },
     ...overrides,
   };
 }
@@ -312,4 +313,41 @@ describe("useGitBrowser", () => {
     expect(result.current.isCommitting).toBe(true);
     expect(result.current.isPushing).toBe(false);
   });
+
+  it("cleans up branches for the current project and shows a count toast", async () => {
+    const mutateAsync = vi.fn(() =>
+      Promise.resolve({
+        remote_deleted: 3,
+        local_deleted: 2,
+        skipped: 1,
+        errors: 0,
+        truncated: false,
+      }),
+    );
+    mockUseGitOperations.mockReturnValue(
+      buildMutations({ cleanupBranches: { mutateAsync, isPending: false } }),
+    );
+
+    const { result } = renderHook(() => useGitBrowser());
+    await result.current.handleCleanupBranches();
+
+    await waitFor(() =>
+      expect(mutateAsync).toHaveBeenCalledWith({ project_slug: "roboco" }),
+    );
+    expect(mockToastSuccess).toHaveBeenCalledWith(
+      "Cleaned up branches: 3 remote, 2 local, 1 skipped, 0 errors",
+    );
+  });
+
+  it("shows an error toast when branch cleanup fails", async () => {
+    const mutateAsync = vi.fn(() => Promise.reject(new Error("boom")));
+    mockUseGitOperations.mockReturnValue(
+      buildMutations({ cleanupBranches: { mutateAsync, isPending: false } }),
+    );
+
+    const { result } = renderHook(() => useGitBrowser());
+    await result.current.handleCleanupBranches();
+
+    await waitFor(() => expect(mockToastError).toHaveBeenCalledWith("boom"));
+  });
 });
diff --git a/panel/src/hooks/use-git-browser.ts b/panel/src/hooks/use-git-browser.ts
index bc1de13b..9b32abae 100644
--- a/panel/src/hooks/use-git-browser.ts
+++ b/panel/src/hooks/use-git-browser.ts
@@ -1,6 +1,6 @@
 "use client";
 
-import { useCallback, useEffect } from "react";
+import { useCallback, useEffect, useRef } from "react";
 import { useRouter, useSearchParams } from "next/navigation";
 import { toast } from "sonner";
 import { useProjects } from "@/hooks/use-projects";
@@ -45,6 +45,7 @@ export interface UseGitBrowserResult {
   handlePull: () => Promise<void>;
   handleFetch: () => Promise<void>;
   handleRebase: (targetBranch: string) => Promise<void>;
+  handleCleanupBranches: () => Promise<void>;
   isCommitting: boolean;
   isPushing: boolean;
   isCreatingPR: boolean;
@@ -54,6 +55,7 @@ export interface UseGitBrowserResult {
   isRebasing: boolean;
   isCheckingOut: boolean;
   isCreatingBranch: boolean;
+  isCleaningUpBranches: boolean;
 }
 
 /**
@@ -162,8 +164,12 @@ export function useGitBrowser(): UseGitBrowserResult {
     pull,
     fetch,
     rebase,
+    cleanupBranches,
   } = useGitOperations();
 
+  // Resume point for a capped stale-branch sweep, per project.
+  const cleanupCursorRef = useRef<{ slug: string; cursor: string } | null>(null);
+
   const handleCheckout = useCallback(
     async (branch: string) => {
       try {
@@ -317,6 +323,35 @@ export function useGitBrowser(): UseGitBrowserResult {
     [projectSlug, taskId, rebase],
   );
 
+  const handleCleanupBranches = useCallback(async () => {
+    try {
+      // Resume a capped sweep from where the last click stopped — without
+      // the cursor the backend re-scans the identical first window forever.
+      const cursor =
+        cleanupCursorRef.current?.slug === projectSlug
+          ? cleanupCursorRef.current.cursor
+          : undefined;
+      const result = await cleanupBranches.mutateAsync({
+        project_slug: projectSlug,
+        ...(cursor ? { after_cursor: cursor } : {}),
+      });
+      cleanupCursorRef.current =
+        result.truncated && result.next_cursor
+          ? { slug: projectSlug, cursor: result.next_cursor }
+          : null;
+      const truncatedNote = result.truncated
+        ? " (cap reached — click again to continue where it stopped)"
+        : "";
+      toast.success(
+        `Cleaned up branches: ${result.remote_deleted} remote, ` +
+          `${result.local_deleted} local, ${result.skipped} skipped, ` +
+          `${result.errors} errors${truncatedNote}`,
+      );
+    } catch (error) {
+      toast.error(getErrorMessage(error));
+    }
+  }, [projectSlug, cleanupBranches]);
+
   const isOffline =
     !!projectsError &&
     (projectsError.message?.includes("Network Error") ||
@@ -349,6 +384,7 @@ export function useGitBrowser(): UseGitBrowserResult {
     handlePull,
     handleFetch,
     handleRebase,
+    handleCleanupBranches,
     isCommitting: commit.isPending,
     isPushing: push.isPending,
     isCreatingPR: createPR.isPending,
@@ -358,5 +394,6 @@ export function useGitBrowser(): UseGitBrowserResult {
     isRebasing: rebase.isPending,
     isCheckingOut: checkout.isPending,
     isCreatingBranch: createBranch.isPending,
+    isCleaningUpBranches: cleanupBranches.isPending,
   };
 }
diff --git a/panel/src/hooks/use-git.ts b/panel/src/hooks/use-git.ts
index bf563cb9..da8f0370 100644
--- a/panel/src/hooks/use-git.ts
+++ b/panel/src/hooks/use-git.ts
@@ -30,6 +30,8 @@ import type {
   GitFetchResponse,
   GitRebaseRequest,
   GitRebaseResponse,
+  GitBranchCleanupRequest,
+  GitBranchCleanupResponse,
 } from "@/types/git";
 
 // =============================================================================
@@ -331,6 +333,27 @@ export function useGitRebase() {
   });
 }
 
+/**
+ * Sweep a project's terminal-task branches (remote + local, PM/CEO only)
+ */
+export function useCleanupBranches() {
+  const queryClient = useQueryClient();
+
+  return useMutation<
+    GitBranchCleanupResponse,
+    Error,
+    GitBranchCleanupRequest
+  >({
+    mutationFn: (request) => gitApi.cleanupBranches(request),
+    onSuccess: (_, variables) => {
+      // Invalidate branches — the sweep may have deleted several.
+      queryClient.invalidateQueries({
+        queryKey: [...gitKeys.all, "branches", variables.project_slug],
+      });
+    },
+  });
+}
+
 // =============================================================================
 // Bundled Hook for Git Operations
 // =============================================================================
@@ -348,6 +371,7 @@ export function useGitOperations() {
   const pull = useGitPull();
   const fetch = useGitFetch();
   const rebase = useGitRebase();
+  const cleanupBranches = useCleanupBranches();
 
   return {
     commit,
@@ -359,5 +383,6 @@ export function useGitOperations() {
     pull,
     fetch,
     rebase,
+    cleanupBranches,
   };
 }
diff --git a/panel/src/lib/api/git.ts b/panel/src/lib/api/git.ts
index d5d70a0f..8ad6b16f 100644
--- a/panel/src/lib/api/git.ts
+++ b/panel/src/lib/api/git.ts
@@ -30,6 +30,8 @@ import type {
   GitFetchResponse,
   GitRebaseRequest,
   GitRebaseResponse,
+  GitBranchCleanupRequest,
+  GitBranchCleanupResponse,
 } from "@/types/git";
 
 // =============================================================================
@@ -358,4 +360,28 @@ export const gitApi = {
     const { data } = await api.post<GitRebaseResponse>("/git/rebase", request);
     return data;
   },
+
+  /**
+   * Sweep a project's terminal-task branches (remote + local, PM/CEO only)
+   */
+  cleanupBranches: async (
+    request: GitBranchCleanupRequest,
+  ): Promise<GitBranchCleanupResponse> => {
+    if (isMockMode()) {
+      return {
+        project_slug: request.project_slug,
+        remote_deleted: 3,
+        local_deleted: 3,
+        skipped: 0,
+        errors: 0,
+        truncated: false,
+        next_cursor: null,
+      };
+    }
+    const { data } = await api.post<GitBranchCleanupResponse>(
+      "/git/branches/cleanup",
+      request,
+    );
+    return data;
+  },
 };
diff --git a/panel/src/types/git.ts b/panel/src/types/git.ts
index 7456b823..f0de1012 100644
--- a/panel/src/types/git.ts
+++ b/panel/src/types/git.ts
@@ -198,3 +198,19 @@ export interface GitRebaseResponse {
   conflict: boolean;
   conflicted_files: string[];
 }
+
+export interface GitBranchCleanupRequest {
+  project_slug: string;
+  /** Resume point from a prior truncated sweep's next_cursor. */
+  after_cursor?: string;
+}
+
+export interface GitBranchCleanupResponse {
+  project_slug: string;
+  remote_deleted: number;
+  local_deleted: number;
+  skipped: number;
+  errors: number;
+  truncated: boolean;
+  next_cursor: string | null;
+}
diff --git a/roboco/api/routes/git.py b/roboco/api/routes/git.py
index 1c15a087..f969fa7d 100644
--- a/roboco/api/routes/git.py
+++ b/roboco/api/routes/git.py
@@ -31,6 +31,8 @@ from roboco.api.deps import CurrentAgentContext, DbSession
 from roboco.api.schemas.git import (
     BranchInfo,
     CommitInfo,
+    GitBranchCleanupRequest,
+    GitBranchCleanupResponse,
     GitBranchListResponse,
     GitCheckoutRequest,
     GitCheckoutResponse,
@@ -763,3 +765,60 @@ async def rebase_branch(
         conflict=conflict,
         conflicted_files=conflicted_files,
     )
+
+
+@router.post("/branches/cleanup", response_model=GitBranchCleanupResponse)
+@guard_deco.rate_limit(requests=5, window=60)
+@guard_deco.max_request_size(size_bytes=65536)
+@guard_deco.block_clouds()
+@guard_deco.content_type_filter(["application/json"])
+async def cleanup_stale_branches(
+    data: GitBranchCleanupRequest,
+    db: DbSession,
+    agent: CurrentAgentContext,
+) -> GitBranchCleanupResponse:
+    """Sweep a project's terminal-task branches (PM/CEO only).
+
+    Deletes the remote + local branch of every completed/cancelled task in
+    the project (capped per call — see ``GitService.cleanup_stale_branches``),
+    skipping the default branch and any environment-ladder rung so a live
+    integration/prod branch is never touched. Role-gated identically to
+    ``/rebase`` — a history-affecting bulk operation shouldn't be open to
+    developers either. Purely a read + external-git-op endpoint: no task rows
+    are mutated, so there's nothing for this request to commit.
+    """
+    if agent.role not in _REBASE_ALLOWED_ROLES:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail=(
+                f"BRANCH_CLEANUP_ROLE_RESTRICTED: Role '{agent.role}' is not "
+                "permitted to sweep branches. Only CEO and PM roles (cell_pm, "
+                "main_pm) may use this endpoint."
+            ),
+        )
+    project_slug = await _resolve_project_slug(data.project_slug, db)
+    git_service = get_git_service(db)
+
+    try:
+        (
+            remote_deleted,
+            local_deleted,
+            skipped,
+            errors,
+            truncated,
+            next_cursor,
+        ) = await git_service.cleanup_stale_branches(
+            project_slug, after_task_id=data.after_cursor
+        )
+    except _TranslatableError as e:
+        raise _translate_error(e) from e
+
+    return GitBranchCleanupResponse(
+        project_slug=project_slug,
+        remote_deleted=remote_deleted,
+        local_deleted=local_deleted,
+        skipped=skipped,
+        errors=errors,
+        truncated=truncated,
+        next_cursor=next_cursor,
+    )
diff --git a/roboco/api/schemas/git.py b/roboco/api/schemas/git.py
index 410f6a76..970d8ccd 100644
--- a/roboco/api/schemas/git.py
+++ b/roboco/api/schemas/git.py
@@ -334,6 +334,42 @@ class GitRebaseResponse(BaseModel):
     conflicted_files: list[str] = []
 
 
+# =============================================================================
+# BRANCH CLEANUP
+# =============================================================================
+
+
+class GitBranchCleanupRequest(BaseModel):
+    """Request to sweep a project's terminal-task branches.
+
+    ``after_cursor`` resumes a capped sweep from a prior response's
+    ``next_cursor`` — task rows never change as a sweep side effect, so
+    without it a repeat call re-scans the same first window forever.
+    """
+
+    project_slug: str
+    after_cursor: UUID | None = None
+
+
+class GitBranchCleanupResponse(BaseModel):
+    """Counts from a stale-branch cleanup sweep.
+
+    ``local_deleted`` counts an attempted local delete (assignee/clone
+    resolved), not a confirmed one — the underlying ``git branch -D`` is
+    itself best-effort. ``truncated`` is True when more terminal-task
+    branches existed than the per-call cap; ``next_cursor`` is then the
+    resume point to pass back as ``after_cursor``.
+    """
+
+    project_slug: str
+    remote_deleted: int = 0
+    local_deleted: int = 0
+    skipped: int = 0
+    errors: int = 0
+    truncated: bool = False
+    next_cursor: str | None = None
+
+
 # =============================================================================
 # GATEWAY-LAYER LIGHTWEIGHT SCHEMAS
 #
diff --git a/roboco/services/git.py b/roboco/services/git.py
index 48df2128..81d68147 100644
--- a/roboco/services/git.py
+++ b/roboco/services/git.py
@@ -42,7 +42,7 @@ if TYPE_CHECKING:
         GitCreatePRRequest,
         GitMergePRRequest,
     )
-    from roboco.db.tables import TaskTable
+    from roboco.db.tables import ProjectTable, TaskTable
 from roboco.config import settings
 from roboco.exceptions import (
     GitCommandError,
@@ -53,7 +53,7 @@ from roboco.exceptions import (
 from roboco.foundation.policy import lifecycle
 from roboco.foundation.policy.pr_labels import CONVENTIONS_PR_LABELS, derive_pr_labels
 from roboco.models.base import AgentRole, TaskStatus
-from roboco.models.env_branches import head_branch
+from roboco.models.env_branches import effective_environments, head_branch
 from roboco.services.base import (
     BaseService,
     NotFoundError,
@@ -3607,16 +3607,19 @@ class GitService(BaseService):
 
     async def _delete_remote_branch_best_effort(
         self, owner: str, repo: str, branch: str, git_token: str
-    ) -> None:
+    ) -> bool:
         """Best-effort: delete a remote branch by name.
 
         Silently swallows errors — cleanup is not critical. Skips branches that
         look like project defaults (main / master / develop) and any branch that
         still has open dependent PRs (an active integration target — deleting it
-        would strand in-flight child work).
+        would strand in-flight child work). Returns True if the delete request
+        was issued with no transport error, False on any skip/failure — callers
+        that only fire-and-forget can ignore it; the branch-cleanup sweep uses
+        it to report counts.
         """
         if branch in ("main", "master", "develop", ""):
-            return
+            return False
         if await self._branch_has_open_dependents(owner, repo, branch, git_token):
             self.log.info(
                 "branch delete skipped: open dependent PRs target it as base",
@@ -3624,7 +3627,7 @@ class GitService(BaseService):
                 owner=owner,
                 repo=repo,
             )
-            return
+            return False
         try:
             async with httpx.AsyncClient(timeout=10.0) as client:
                 await client.delete(
@@ -3635,8 +3638,9 @@ class GitService(BaseService):
                         "X-GitHub-Api-Version": "2022-11-28",
                     },
                 )
+            return True
         except httpx.HTTPError:
-            return
+            return False
 
     async def _delete_pr_branch_best_effort(
         self, owner: str, repo: str, pr_number: int, git_token: str
@@ -3664,15 +3668,25 @@ class GitService(BaseService):
         except httpx.HTTPError:
             return
 
-    async def delete_task_branch(self, project_slug: str, branch_name: str) -> None:
+    async def delete_task_branch(self, project_slug: str, branch_name: str) -> bool:
         """Delete a remote task branch after cancel/discard. Best-effort.
 
         Called by `TaskService` on cancellation so abandoned task
-        branches don't accumulate on the remote.
+        branches don't accumulate on the remote. Returns whether the delete
+        was actually issued (see ``_delete_remote_branch_best_effort``).
+
+        This is the chokepoint every task-scoped remote-delete call routes
+        through, so the environment-ladder guard lives here rather than only
+        at each caller: ``_delete_remote_branch_best_effort``'s own
+        main/master/develop skip predates the env-ladder model and doesn't
+        know about it (it's a generic branch-delete primitive also used by
+        the merged-PR source-branch cleanup, which never targets a ladder
+        branch by construction) — a task's ``branch_name`` could otherwise
+        coincide with a ladder rung and get deleted out from under it.
         """
         git_token = await self._token_for_project(project_slug)
         if not git_token:
-            return
+            return False
         # Resolve remote from any workspace — branch deletion only needs
         # the owner/repo, not a checkout. Use a service-root probe path
         # if no agent workspace is available.
@@ -3680,14 +3694,148 @@ class GitService(BaseService):
             project_service = get_project_service(self.session)
             project = await project_service.get_by_slug(project_slug)
             if not project or not project.git_url:
-                return
+                return False
+            if branch_name in {r.branch for r in effective_environments(project)}:
+                return False
             owner, repo = self._parse_git_url(project.git_url)
         except Exception:
-            return
-        await self._delete_remote_branch_best_effort(
+            return False
+        return await self._delete_remote_branch_best_effort(
             owner, repo, branch_name, git_token
         )
 
+    # Per-call cap on the stale-branch sweep so one request can't hang on an
+    # unbounded fan-out of remote-delete calls.
+    _CLEANUP_BRANCH_LIMIT = 200
+
+    async def cleanup_stale_branches(
+        self, project_slug: str, after_task_id: UUID | None = None
+    ) -> tuple[int, int, int, int, bool, str | None]:
+        """Sweep a project's terminal tasks and delete their spent branches.
+
+        Candidates are TERMINAL (completed/cancelled) tasks with a
+        ``branch_name`` that isn't an environment-ladder rung (a ladder branch
+        outlives any one task — see ``roboco.models.env_branches``). Capped at
+        ``_CLEANUP_BRANCH_LIMIT`` per call; the window is deterministic
+        (``ORDER BY id``) and cursor-resumable via ``after_task_id`` — task
+        rows never change as a side effect of the sweep, so without a cursor a
+        repeat call would re-scan the identical first window forever instead
+        of progressing past the cap. Ladder-branch rows still advance the
+        cursor (processed-as-excluded), so ``truncated`` can't go false-
+        negative when rungs land inside the window. Per branch, best-effort:
+        remote delete (the same guarded ``delete_task_branch`` cancel already
+        uses — main/master/develop and open-dependent-PR branches are skipped
+        there too) and, in the assignee's clone, a force local delete (a
+        completed task's branch was squash-merged, so a safe ``-d`` would
+        refuse unconditionally; a cancelled one's work is discarded by
+        decision).
+
+        Returns ``(remote_deleted, local_deleted, skipped, errors, truncated,
+        next_cursor)`` — ``next_cursor`` is the last processed task id when
+        truncated, to pass back as ``after_task_id``. ``local_deleted`` counts
+        a local delete as ATTEMPTED (assignee/clone resolved), not confirmed —
+        the underlying ``git branch -D`` is itself best-effort and reports no
+        outcome. ``skipped`` counts branches with no resolvable assignee/clone
+        (nothing to locally clean up, though the remote delete may still have
+        run); ``errors`` counts branches that raised unexpectedly while
+        resolving the assignee's workspace.
+        """
+        project_service = get_project_service(self.session)
+        project = await project_service.get_by_slug(project_slug)
+        if not project:
+            return (0, 0, 0, 0, False, None)
+
+        candidates, truncated, next_cursor = await self._stale_branch_window(
+            project, after_task_id
+        )
+
+        remote_deleted = local_deleted = skipped = errors = 0
+        workspace_service = get_workspace_service(self.session)
+        for task in candidates:
+            branch = str(task.branch_name)
+            try:
+                remote_ok, local_attempted = await self._cleanup_one_stale_branch(
+                    project_slug, task, branch, workspace_service
+                )
+            except Exception as e:
+                errors += 1
+                self.log.warning(
+                    "Stale-branch cleanup skipped for branch",
+                    project_slug=project_slug,
+                    branch=branch,
+                    error=str(e),
+                )
+                continue
+            remote_deleted += int(remote_ok)
+            if local_attempted:
+                local_deleted += 1
+            else:
+                skipped += 1
+
+        return (remote_deleted, local_deleted, skipped, errors, truncated, next_cursor)
+
+    async def _stale_branch_window(
+        self, project: ProjectTable, after_task_id: UUID | None
+    ) -> tuple[list[TaskTable], bool, str | None]:
+        """Fetch one deterministic, cursor-resumable window of terminal-task
+        branch-cleanup candidates for ``cleanup_stale_branches``.
+
+        Returns ``(candidates, truncated, next_cursor)`` — ladder-branch rows
+        stay in the window (and so still advance the cursor) but are excluded
+        from ``candidates``, matching the caller's docstring.
+        """
+        from sqlalchemy import select
+
+        from roboco.db.tables import TaskTable
+
+        ladder_branches = {rung.branch for rung in effective_environments(project)}
+        query = (
+            select(TaskTable)
+            .where(TaskTable.project_id == project.id)
+            .where(TaskTable.branch_name.is_not(None))
+            .where(TaskTable.status.in_([TaskStatus.COMPLETED, TaskStatus.CANCELLED]))
+            .order_by(TaskTable.id)
+            .limit(self._CLEANUP_BRANCH_LIMIT + 1)
+        )
+        if after_task_id is not None:
+            query = query.where(TaskTable.id > after_task_id)
+        result = await self.session.execute(query)
+        window = list(result.scalars().all())
+        truncated = len(window) > self._CLEANUP_BRANCH_LIMIT
+        window = window[: self._CLEANUP_BRANCH_LIMIT]
+        next_cursor = str(window[-1].id) if truncated and window else None
+        candidates = [t for t in window if str(t.branch_name) not in ladder_branches]
+        return candidates, truncated, next_cursor
+
+    async def _cleanup_one_stale_branch(
+        self,
+        project_slug: str,
+        task: TaskTable,
+        branch: str,
+        workspace_service: WorkspaceService,
+    ) -> tuple[bool, bool]:
+        """Delete one candidate's remote + local branch.
+
+        Returns ``(remote_deleted, local_attempted)`` — see
+        ``cleanup_stale_branches`` for what each means. Raises on an
+        unexpected failure so the caller's per-branch try/except counts it.
+        """
+        remote_deleted = await self.delete_task_branch(project_slug, branch)
+
+        assignee = task.assignee
+        if assignee is None or assignee.team is None or assignee.slug is None:
+            return remote_deleted, False
+
+        clone_root = workspace_service.get_clone_root_path(
+            project_slug, assignee.team, assignee.slug
+        )
+        # force for every terminal candidate: a completed task's PR was
+        # squash-merged (its local ref is never an ancestor of the base, so
+        # -d refuses unconditionally), a cancelled one's work is discarded
+        # by decision — the ref is spent either way.
+        await workspace_service.delete_local_branch(clone_root, branch, force=True)
+        return remote_deleted, True
+
     async def _first_allowed_merge_method(
         self,
         owner: str,
diff --git a/roboco/services/task.py b/roboco/services/task.py
index af9aa777..bd3408f6 100644
--- a/roboco/services/task.py
+++ b/roboco/services/task.py
@@ -6,6 +6,7 @@ Handles status transitions, assignments, and queries.
 """
 
 import asyncio
+import shutil
 from dataclasses import dataclass
 from datetime import UTC, datetime, timedelta
 from pathlib import Path
@@ -60,7 +61,7 @@ from roboco.models.base import (
     TaskType,
     Team,
 )
-from roboco.models.env_branches import head_branch
+from roboco.models.env_branches import effective_environments, head_branch
 from roboco.models.permissions import AgentContext, TaskAction
 from roboco.models.task import TaskCreateRequest
 from roboco.models.work_session import WorkSessionCreate
@@ -6723,30 +6724,36 @@ class TaskService(BaseService):
         await ws_service.abandon(require_uuid(task.work_session_id), reason=reason)
 
     async def _delete_task_branch_best_effort(self, task: TaskTable) -> None:
-        """Delete the task's remote branch + per-task worktree on cancel.
+        """Delete the task's remote + local branch and per-task worktree on
+        cancel.
 
         Best-effort, never raises. Skipped for tasks that didn't make it to a
         branch yet, or whose PR already merged (merge path deletes the source
         branch). The worktree at ``{clone_root}/.worktrees/{task-short}/`` is
         removed from the assignee's clone so cancelled tasks don't leak full
-        working trees on disk (F123). The stale-claim reaper must NOT call this
-        — it routes to ``pending`` for a re-claim that reuses the worktree.
+        working trees on disk (F123); the local branch ref (force-deleted —
+        cancelled work is discarded on purpose) and the task's video-preview
+        dir are cleaned up alongside it. The stale-claim reaper must NOT call
+        this — it routes to ``pending`` for a re-claim that reuses the
+        worktree.
         """
         branch = task.branch_name
         if not branch:
             return
         try:
             project_result = await self.session.execute(
-                select(ProjectTable.slug).where(ProjectTable.id == task.project_id)
+                select(ProjectTable).where(ProjectTable.id == task.project_id)
             )
-            project_slug = project_result.scalar_one_or_none()
-            if not project_slug:
+            project = project_result.scalar_one_or_none()
+            if not project:
                 return
             from roboco.services.git import get_git_service
 
             git_service = get_git_service(self.session)
-            await git_service.delete_task_branch(project_slug, str(branch))
-            await self._remove_task_worktree_best_effort(task, project_slug)
+            await git_service.delete_task_branch(project.slug, str(branch))
+            await self._remove_task_worktree_best_effort(
+                task, project, force_branch_delete=True
+            )
         except Exception as e:
             # Cleanup is best-effort — don't fail the cancel if the
             # remote is unreachable or the branch is already gone.
@@ -6758,46 +6765,95 @@ class TaskService(BaseService):
             )
 
     async def _remove_task_worktree_best_effort(
-        self, task: TaskTable, project_slug: str
+        self, task: TaskTable, project: ProjectTable, *, force_branch_delete: bool
     ) -> None:
-        """Remove the per-task worktree from the assignee's clone. Never raises.
+        """Remove the per-task worktree + local branch ref, and rmtree the
+        task's video-preview dir. Never raises.
 
-        No-op when the task has no resolvable assignee (pooled/unassigned at
-        cancel) or the assignee carries no team (can't form a clone path).
+        The worktree/local-branch step no-ops when the task has no resolvable
+        assignee (pooled/unassigned at cancel) or the assignee carries no team
+        (can't form a clone path); previews cleanup still runs regardless
+        (project-scoped, not clone-scoped). The local branch is skipped
+        entirely when it's still an environment-ladder rung — a ladder branch
+        outlives any one task.
         """
         assignee = task.assignee
-        if assignee is None or assignee.team is None or assignee.slug is None:
-            return
-        from roboco.services.workspace import get_workspace_service
+        if (
+            assignee is not None
+            and assignee.team is not None
+            and assignee.slug is not None
+        ):
+            from roboco.services.workspace import get_workspace_service
 
-        ws_service = get_workspace_service(self.session)
-        clone_root = ws_service.get_clone_root_path(
-            project_slug, assignee.team, assignee.slug
-        )
-        worktree = clone_root / ".worktrees" / str(task.id)[:8]
-        await ws_service.remove_worktree(clone_root, worktree)
+            ws_service = get_workspace_service(self.session)
+            clone_root = ws_service.get_clone_root_path(
+                project.slug, assignee.team, assignee.slug
+            )
+            worktree = clone_root / ".worktrees" / str(task.id)[:8]
+            await ws_service.remove_worktree(clone_root, worktree)
+
+            branch = task.branch_name
+            ladder_branches = {r.branch for r in effective_environments(project)}
+            if branch and str(branch) not in ladder_branches:
+                await ws_service.delete_local_branch(
+                    clone_root, str(branch), force=force_branch_delete
+                )
+
+        self._cleanup_task_previews_best_effort(task, project.slug)
+
+    def _cleanup_task_previews_best_effort(
+        self, task: TaskTable, project_slug: str
+    ) -> None:
+        """Best-effort rmtree of the task's video-render preview dir.
+
+        Nothing else prunes it (``_render_extract_frames`` writes frames but
+        no cleanup runs on task end), so a video-authoring task's previews
+        would otherwise leak on disk forever. Guards the resolved path stays
+        under the project's workspace dir before deleting anything.
+        """
+        from roboco.config import settings
+
+        project_dir = Path(settings.workspaces_root) / project_slug
+        previews_dir = project_dir / ".previews" / str(task.id)[:8]
+        try:
+            if not previews_dir.exists():
+                return
+            if not previews_dir.resolve().is_relative_to(project_dir.resolve()):
+                return
+            shutil.rmtree(previews_dir)
+        except Exception as e:
+            self.log.warning(
+                "Preview cleanup skipped", task_id=str(task.id), error=str(e)
+            )
 
     async def _remove_task_worktree_on_terminal(self, task: TaskTable) -> None:
-        """Best-effort per-task worktree removal on terminal completion.
+        """Best-effort per-task worktree + local-branch removal on terminal
+        completion.
 
-        Mirrors the cancel-path cleanup but WITHOUT deleting the remote branch
-        (the merge path already deleted it). A completed/merged task would
-        otherwise leak its worktree on disk until the whole agent is deleted
-        (F123). Best-effort: never raises, so a cleanup failure can't block
-        completion. No-op for branchless tasks (no worktree was ever cut).
-        Terminal-only by call site — earlier review states may bounce
-        ``needs_revision`` and need the worktree back.
+        Force-deletes the local branch ref (``-D``), same as the cancel path:
+        completion implies the PR already merged remotely (the merge path
+        deleted the remote branch), and the default merge method is SQUASH —
+        the local ref's commits are never ancestors of the base, so a "safe"
+        ``-d`` refuses every time and the ref would leak forever. The ref is
+        spent either way once the task is terminal. A completed task would
+        otherwise leak its worktree + branch ref on disk until the whole
+        agent is deleted (F123). Best-effort: never raises, so a cleanup
+        failure can't block completion. No-op for branchless tasks (no
+        worktree was ever cut). Terminal-only by call site — earlier review
+        states may bounce ``needs_revision`` and need the worktree back.
         """
         if not task.branch_name:
             return
         try:
             result = await self.session.execute(
-                select(ProjectTable.slug).where(ProjectTable.id == task.project_id)
+                select(ProjectTable).where(ProjectTable.id == task.project_id)
             )
-            project_slug = result.scalar_one_or_none()
-            if not project_slug:
+            project = result.scalar_one_or_none()
+            if not project:
                 return
-            await self._remove_task_worktree_best_effort(task, project_slug)
+            await self._remove_task_worktree_best_effort(
+                task, project, force_branch_delete=True
+            )
         except OSError as e:
             # FS/permission failure (stuck mount, perms) — systemic, not
             # task-specific. Track the streak and escalate a CEO alert once
diff --git a/roboco/services/workspace.py b/roboco/services/workspace.py
index c4054e01..e1becb87 100644
--- a/roboco/services/workspace.py
+++ b/roboco/services/workspace.py
@@ -784,6 +784,29 @@ class WorkspaceService:
         )
         self._worktree_git(clone_root, ["worktree", "prune"], check=False)
 
+    async def delete_local_branch(
+        self, clone_root: Path, branch: str, *, force: bool
+    ) -> None:
+        """Delete a local branch ref in a clone. Best-effort, never raises.
+
+        ``remove_worktree`` only detaches the worktree — the local
+        ``refs/heads/{branch}`` ref survives, so every task an agent ever
+        claimed leaks a permanent branch ref in that agent's clone. Callers
+        run this right after ``remove_worktree`` (the worktree must be gone
+        first, or ``git branch -d/-D`` refuses a branch still checked out
+        elsewhere in the clone).
+
+        ``force=False`` uses ``-d`` (refuses an unmerged branch — a clean skip,
+        not an error, via ``check=False``); ``force=True`` uses ``-D``. A
+        missing branch is likewise a clean skip. Never touches main/master/
+        develop or an empty branch name — mirrors
+        ``GitService._delete_remote_branch_best_effort``'s default-branch guard.
+        """
+        if branch in ("main", "master", "develop", ""):
+            return
+        flag = "-D" if force else "-d"
+        self._worktree_git(clone_root, ["branch", flag, branch], check=False)
+
     async def resolve_workspace(
         self,
         project_slug: str,
diff --git a/tests/integration/test_git_cleanup_stale_branches.py b/tests/integration/test_git_cleanup_stale_branches.py
new file mode 100644
index 00000000..089ab49f
--- /dev/null
+++ b/tests/integration/test_git_cleanup_stale_branches.py
@@ -0,0 +1,302 @@
+"""GitService.cleanup_stale_branches — the branch-cleanup sweep's selection
++ per-branch delete logic (backs the panel's "Clean up stale branches"
+button / POST /git/branches/cleanup).
+
+Real DB (ProjectTable/TaskTable/AgentTable) so the terminal-only + env-ladder
+selection runs for real; the two external-I/O boundaries are mocked so the
+test never makes a real GitHub API call or runs a real git subprocess:
+``_delete_remote_branch_best_effort`` (network) and
+``roboco.services.git.get_workspace_service`` (local clone/subprocess).
+"""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, Any
+from unittest.mock import AsyncMock, MagicMock
+from uuid import UUID, uuid4
+
+import pytest
+import pytest_asyncio
+from roboco.db.tables import AgentTable, ProjectTable, TaskTable
+from roboco.models.base import (
+    AgentRole,
+    AgentStatus,
+    TaskNature,
+    TaskStatus,
+    TaskType,
+    Team,
+)
+from roboco.services.git import GitService
+
+if TYPE_CHECKING:
+    from collections.abc import AsyncIterator
+
+    from sqlalchemy.ext.asyncio import AsyncSession
+
+
+@pytest_asyncio.fixture
+async def cleanup_setup(
+    db_session: AsyncSession, monkeypatch: pytest.MonkeyPatch
+) -> AsyncIterator[dict[str, Any]]:
+    agent = AgentTable(
+        id=uuid4(),
+        name="Dev",
+        slug=f"be-dev-{uuid4().hex[:8]}",
+        role=AgentRole.DEVELOPER,
+        team=Team.BACKEND,
+        status=AgentStatus.ACTIVE,
+        model_config={},
+        system_prompt="dev",
+        capabilities=[],
+        permissions={},
+        metrics={},
+    )
+    db_session.add(agent)
+    await db_session.flush()
+    project = ProjectTable(
+        id=uuid4(),
+        name="P",
+        slug=f"p-{uuid4().hex[:8]}",
+        git_url="https://github.com/acme/repo.git",
+        default_branch="master",
+        assigned_cell=Team.BACKEND,
+        created_by=agent.id,
+    )
+    db_session.add(project)
+    await db_session.flush()
+
+    svc = GitService(db_session)
+    monkeypatch.setattr(svc, "_token_for_project", AsyncMock(return_value="tok"))
+    # Remote delete: no real HTTP — a bare True/False signal is all
+    # cleanup_stale_branches consumes from it.
+    monkeypatch.setattr(
+        svc, "_delete_remote_branch_best_effort", AsyncMock(return_value=True)
+    )
+    ws_svc = MagicMock()
+    ws_svc.get_clone_root_path = MagicMock(
+        return_value=f"/data/workspaces/{project.slug}/backend/{agent.slug}"
+    )
+    ws_svc.delete_local_branch = AsyncMock()
+    monkeypatch.setattr("roboco.services.git.get_workspace_service", lambda _s: ws_svc)
+
+    yield {
+        "svc": svc,
+        "db": db_session,
+        "agent": agent,
+        "project": project,
+        "ws_svc": ws_svc,
+    }
+
+
+def _task(
+    setup: dict[str, Any],
+    *,
+    branch: str,
+    status: TaskStatus,
+    assigned: bool = True,
+) -> TaskTable:
+    task = TaskTable(
+        id=uuid4(),
+        title="t",
+        description="d",
+        status=status,
+        task_type=TaskType.CODE,
+        nature=TaskNature.TECHNICAL,
+        team=Team.BACKEND,
+        project_id=setup["project"].id,
+        created_by=setup["agent"].id,
+        assigned_to=setup["agent"].id if assigned else None,
+        acceptance_criteria=["ac"],
+        branch_name=branch,
+    )
+    setup["db"].add(task)
+    return task
+
+
+@pytest.mark.asyncio
+async def test_only_terminal_tasks_are_candidates(
+    cleanup_setup: dict[str, Any],
+) -> None:
+    _task(cleanup_setup, branch="feature/backend/pending", status=TaskStatus.PENDING)
+    _task(
+        cleanup_setup,
+        branch="feature/backend/inprogress",
+        status=TaskStatus.IN_PROGRESS,
+    )
+    _task(
+        cleanup_setup, branch="feature/backend/completed", status=TaskStatus.COMPLETED
+    )
+    _task(
+        cleanup_setup, branch="feature/backend/cancelled", status=TaskStatus.CANCELLED
+    )
+    await cleanup_setup["db"].flush()
+
+    result = await cleanup_setup["svc"].cleanup_stale_branches(
+        cleanup_setup["project"].slug
+    )
+
+    # Only the 2 terminal tasks are candidates — pending/in_progress untouched.
+    assert result == (2, 2, 0, 0, False, None)
+
+
+@pytest.mark.asyncio
+async def test_env_ladder_branch_is_excluded(cleanup_setup: dict[str, Any]) -> None:
+    project = cleanup_setup["project"]
+    project.environments = [
+        {"name": "head", "branch": "develop"},
+        {"name": "prod", "branch": "master"},
+    ]
+    await cleanup_setup["db"].flush()
+
+    # A terminal task whose branch happens to equal a ladder rung must never
+    # be touched — the ladder outlives any one task.
+    _task(cleanup_setup, branch="develop", status=TaskStatus.COMPLETED)
+    _task(
+        cleanup_setup, branch="feature/backend/real-task", status=TaskStatus.COMPLETED
+    )
+    await cleanup_setup["db"].flush()
+
+    result = await cleanup_setup["svc"].cleanup_stale_branches(project.slug)
+
+    assert result == (1, 1, 0, 0, False, None)
+    cleanup_setup["ws_svc"].delete_local_branch.assert_awaited_once()
+    call = cleanup_setup["ws_svc"].delete_local_branch.await_args
+    assert call is not None
+    assert call.args[1] == "feature/backend/real-task"
+
+
+@pytest.mark.asyncio
+async def test_cancelled_task_force_deletes_local_branch(
+    cleanup_setup: dict[str, Any],
+) -> None:
+    _task(cleanup_setup, branch="feature/backend/x", status=TaskStatus.CANCELLED)
+    await cleanup_setup["db"].flush()
+
+    await cleanup_setup["svc"].cleanup_stale_branches(cleanup_setup["project"].slug)
+
+    cleanup_setup["ws_svc"].delete_local_branch.assert_awaited_once()
+    call = cleanup_setup["ws_svc"].delete_local_branch.await_args
+    assert call is not None
+    assert call.kwargs["force"] is True
+
+
+@pytest.mark.asyncio
+async def test_completed_task_also_force_deletes_local_branch(
+    cleanup_setup: dict[str, Any],
+) -> None:
+    # Completed ⇒ the PR already squash-merged, so the local ref is spent but
+    # never an ancestor of the base — a "safe" -d would refuse every time.
+    _task(cleanup_setup, branch="feature/backend/x", status=TaskStatus.COMPLETED)
+    await cleanup_setup["db"].flush()
+
+    await cleanup_setup["svc"].cleanup_stale_branches(cleanup_setup["project"].slug)
+
+    cleanup_setup["ws_svc"].delete_local_branch.assert_awaited_once()
+    call = cleanup_setup["ws_svc"].delete_local_branch.await_args
+    assert call is not None
+    assert call.kwargs["force"] is True
+
+
+@pytest.mark.asyncio
+async def test_no_assignee_skips_local_delete_but_still_attempts_remote(
+    cleanup_setup: dict[str, Any],
+) -> None:
+    _task(
+        cleanup_setup,
+        branch="feature/backend/orphan",
+        status=TaskStatus.COMPLETED,
+        assigned=False,
+    )
+    await cleanup_setup["db"].flush()
+
+    result = await cleanup_setup["svc"].cleanup_stale_branches(
+        cleanup_setup["project"].slug
+    )
+
+    assert result == (1, 0, 1, 0, False, None)
+    cleanup_setup["ws_svc"].delete_local_branch.assert_not_awaited()
+
+
+@pytest.mark.asyncio
+async def test_candidate_set_truncated_past_the_cap(
+    cleanup_setup: dict[str, Any], monkeypatch: pytest.MonkeyPatch
+) -> None:
+    monkeypatch.setattr(GitService, "_CLEANUP_BRANCH_LIMIT", 2)
+    for i in range(3):
+        _task(
+            cleanup_setup,
+            branch=f"feature/backend/task-{i}",
+            status=TaskStatus.COMPLETED,
+        )
+    await cleanup_setup["db"].flush()
+
+    result = await cleanup_setup["svc"].cleanup_stale_branches(
+        cleanup_setup["project"].slug
+    )
+
+    assert result[:5] == (2, 2, 0, 0, True)
+    assert result[5] is not None  # resume cursor for the next call
+
+
+@pytest.mark.asyncio
+async def test_capped_sweep_progresses_with_cursor(
+    cleanup_setup: dict[str, Any], monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """Repeated sweeps must cover NEW branches, not re-scan the same window —
+    task rows never change as a sweep side effect, so only the cursor moves
+    the window forward."""
+    monkeypatch.setattr(GitService, "_CLEANUP_BRANCH_LIMIT", 2)
+    for i in range(5):
+        _task(
+            cleanup_setup,
+            branch=f"feature/backend/task-{i}",
+            status=TaskStatus.COMPLETED,
+        )
+    await cleanup_setup["db"].flush()
+    svc = cleanup_setup["svc"]
+    slug = cleanup_setup["project"].slug
+    ws = cleanup_setup["ws_svc"]
+
+    first = await svc.cleanup_stale_branches(slug)
+    assert first[4] is True and first[5] is not None
+    first_branches = {call.args[1] for call in ws.delete_local_branch.await_args_list}
+    ws.delete_local_branch.reset_mock()
+
+    await svc.cleanup_stale_branches(slug, after_task_id=UUID(first[5]))
+    second_branches = {call.args[1] for call in ws.delete_local_branch.await_args_list}
+
+    assert second_branches, "second sweep processed nothing"
+    assert first_branches.isdisjoint(second_branches), (
+        f"second sweep re-touched {first_branches & second_branches}"
+    )
+
+
+@pytest.mark.asyncio
+async def test_unknown_project_returns_zeroed_result(
+    cleanup_setup: dict[str, Any],
+) -> None:
+    result = await cleanup_setup["svc"].cleanup_stale_branches("does-not-exist")
+    assert result == (0, 0, 0, 0, False, None)
+
+
+@pytest.mark.asyncio
+async def test_delete_task_branch_refuses_env_ladder_rung_directly(
+    cleanup_setup: dict[str, Any],
+) -> None:
+    """The chokepoint guard, not just the sweep's candidate filter: even a
+    direct ``delete_task_branch`` call (e.g. the cancel-path caller in
+    task.py) must refuse a branch that is an environment-ladder rung — the
+    generic ``_delete_remote_branch_best_effort`` primitive's own
+    main/master/develop skip predates the ladder model and doesn't know it."""
+    project = cleanup_setup["project"]
+    project.environments = [
+        {"name": "head", "branch": "develop"},
+        {"name": "prod", "branch": "master"},
+    ]
+    await cleanup_setup["db"].flush()
+
+    ok = await cleanup_setup["svc"].delete_task_branch(project.slug, "develop")
+
+    assert ok is False
+    remote_delete = cleanup_setup["svc"]._delete_remote_branch_best_effort
+    remote_delete.assert_not_awaited()
diff --git a/tests/integration/test_git_routes.py b/tests/integration/test_git_routes.py
index 806ea23b..c3bf6ef4 100644
--- a/tests/integration/test_git_routes.py
+++ b/tests/integration/test_git_routes.py
@@ -1002,5 +1002,78 @@ async def test_merge_pr_without_task_id_no_422(git_client: dict) -> None:
     assert response.status_code == HTTPStatus.OK
 
 
+# ---------------------------------------------------------------------------
+# branches/cleanup
+# ---------------------------------------------------------------------------
+
+
+@pytest.mark.asyncio
+async def test_cleanup_branches_success(pm_git_client: dict) -> None:
+    with patch("roboco.api.routes.git.get_git_service") as mock_get:
+        svc = AsyncMock()
+        svc.cleanup_stale_branches = AsyncMock(return_value=(3, 2, 1, 0, False, None))
+        mock_get.return_value = svc
+        response = await pm_git_client["client"].post(
+            "/api/git/branches/cleanup",
+            json={"project_slug": pm_git_client["project"].slug},
+            headers=_HDR,
+        )
+    assert response.status_code == HTTPStatus.OK
+    data = response.json()
+    assert (
+        data["remote_deleted"],
+        data["local_deleted"],
+        data["skipped"],
+        data["errors"],
+        data["truncated"],
+    ) == (3, 2, 1, 0, False)
+    svc.cleanup_stale_branches.assert_awaited_once_with(
+        pm_git_client["project"].slug, after_task_id=None
+    )
+
+
+@pytest.mark.asyncio
+async def test_cleanup_branches_reports_truncation(pm_git_client: dict) -> None:
+    with patch("roboco.api.routes.git.get_git_service") as mock_get:
+        svc = AsyncMock()
+        svc.cleanup_stale_branches = AsyncMock(
+            return_value=(200, 190, 0, 0, True, "0" * 32)
+        )
+        mock_get.return_value = svc
+        response = await pm_git_client["client"].post(
+            "/api/git/branches/cleanup",
+            json={"project_slug": pm_git_client["project"].slug},
+            headers=_HDR,
+        )
+    assert response.status_code == HTTPStatus.OK
+    assert response.json()["truncated"] is True
+
+
+@pytest.mark.asyncio
+async def test_cleanup_branches_developer_gets_403(git_client: dict) -> None:
+    """git_client carries a DEVELOPER-role agent — same role gate as /rebase."""
+    with patch("roboco.api.routes.git.get_git_service") as mock_get:
+        svc = AsyncMock()
+        mock_get.return_value = svc
+        response = await git_client["client"].post(
+            "/api/git/branches/cleanup",
+            json={"project_slug": git_client["project"].slug},
+            headers=_HDR,
+        )
+    assert response.status_code == HTTPStatus.FORBIDDEN
+    assert "BRANCH_CLEANUP_ROLE_RESTRICTED" in response.json()["detail"]
+    mock_get.assert_not_called()
+
+
+@pytest.mark.asyncio
+async def test_cleanup_branches_project_not_found(pm_git_client: dict) -> None:
+    response = await pm_git_client["client"].post(
+        "/api/git/branches/cleanup",
+        json={"project_slug": "does-not-exist"},
+        headers=_HDR,
+    )
+    assert response.status_code == HTTPStatus.NOT_FOUND
+
+
 # Re-export to keep import alive (TC reorders imports)
 _ = SimpleNamespace
diff --git a/tests/unit/services/test_task_cancel_worktree_cleanup.py b/tests/unit/services/test_task_cancel_worktree_cleanup.py
index 94e001af..e8d8620e 100644
--- a/tests/unit/services/test_task_cancel_worktree_cleanup.py
+++ b/tests/unit/services/test_task_cancel_worktree_cleanup.py
@@ -50,7 +50,17 @@ def _task(*, branch: str | None, assignee: MagicMock | None) -> MagicMock:
 
 def _project_result(slug: str | None) -> MagicMock:
     result = MagicMock()
-    result.scalar_one_or_none.return_value = slug
+    # `_delete_task_branch_best_effort` now fetches the full project row (not
+    # just the slug column) so it can resolve the environment ladder before
+    # deleting a local branch. `environments=None` degenerates to a
+    # single-branch ladder off `default_branch` (never equal to a task branch
+    # in these tests, so the ladder-exclusion guard is a no-op here).
+    project = (
+        MagicMock(slug=slug, environments=None, default_branch="master")
+        if slug
+        else None
+    )
+    result.scalar_one_or_none.return_value = project
     return result
 
 
@@ -71,6 +81,7 @@ async def test_cancel_removes_worktree_for_assignee() -> None:
     ws_svc = MagicMock()
     ws_svc.get_clone_root_path = MagicMock(return_value=clone)
     ws_svc.remove_worktree = AsyncMock()
+    ws_svc.delete_local_branch = AsyncMock()
 
     with (
         patch(
@@ -97,6 +108,10 @@ async def test_cancel_removes_worktree_for_assignee() -> None:
         f"remove must target the task worktree {clone}/.worktrees/{short}; "
         f"got {args[1]}"
     )
+    # Cancel force-deletes the local branch ref (-D) — the work is discarded.
+    ws_svc.delete_local_branch.assert_awaited_once_with(
+        clone, "feature/backend/abc12345", force=True
+    )
 
 
 @pytest.mark.asyncio
diff --git a/tests/unit/services/test_workspace_worktree_lifecycle.py b/tests/unit/services/test_workspace_worktree_lifecycle.py
index 93fda610..062baf29 100644
--- a/tests/unit/services/test_workspace_worktree_lifecycle.py
+++ b/tests/unit/services/test_workspace_worktree_lifecycle.py
@@ -485,3 +485,89 @@ async def test_self_heal_recovers_clone_root_left_on_task_branch(clone: Path) ->
     assert (wt / ".git").is_file()
     assert _git(wt, "rev-parse", "--abbrev-ref", "HEAD").strip() == branch
     assert _git(clone, "rev-parse", "--abbrev-ref", "HEAD").strip() == "main"
+
+
+# ---------------------------------------------------------------------------
+# delete_local_branch — cleans up the branch ref remove_worktree leaves behind
+# (worktree removal never deletes refs/heads/{branch}; every claimed task
+# leaked a permanent local branch ref until this).
+# ---------------------------------------------------------------------------
+
+
+async def test_delete_local_branch_skips_default_branches(clone: Path) -> None:
+    svc = _service()
+    for branch in ("main", "master", "develop", ""):
+        await svc.delete_local_branch(clone, branch, force=True)
+    # "main" is the clone's actual current branch — still checked out, untouched.
+    assert _git(clone, "rev-parse", "--abbrev-ref", "HEAD").strip() == "main"
+
+
+async def test_delete_local_branch_removes_merged_branch(clone: Path) -> None:
+    svc = _service()
+    _git(clone, "branch", "feature/merged")  # no new commits -> already merged
+    assert _ref_exists(clone, "refs/heads/feature/merged")
+
+    await svc.delete_local_branch(clone, "feature/merged", force=False)
+
+    assert not _ref_exists(clone, "refs/heads/feature/merged")
+
+
+async def test_delete_local_branch_not_merged_skips_without_force(clone: Path) -> None:
+    svc = _service()
+    _git(clone, "checkout", "-b", "feature/unmerged")
+    (clone / "work.txt").write_text("x")
+    _git(clone, "add", "work.txt")
+    _git(clone, "commit", "-m", "unmerged work")
+    _git(clone, "checkout", "main")
+    assert _ref_exists(clone, "refs/heads/feature/unmerged")
+
+    await svc.delete_local_branch(clone, "feature/unmerged", force=False)
+
+    # `-d` refuses an unmerged branch — a clean skip, not an error, ref stays.
+    assert _ref_exists(clone, "refs/heads/feature/unmerged")
+
+
+async def test_delete_local_branch_force_deletes_unmerged(clone: Path) -> None:
+    svc = _service()
+    _git(clone, "checkout", "-b", "feature/unmerged")
+    (clone / "work.txt").write_text("x")
+    _git(clone, "add", "work.txt")
+    _git(clone, "commit", "-m", "unmerged work")
+    _git(clone, "checkout", "main")
+    assert _ref_exists(clone, "refs/heads/feature/unmerged")
+
+    await svc.delete_local_branch(clone, "feature/unmerged", force=True)
+
+    assert not _ref_exists(clone, "refs/heads/feature/unmerged")
+
+
+async def test_delete_local_branch_squash_merged_needs_force(clone: Path) -> None:
+    # RoboCo's default merge method is SQUASH: the branch's commits are never
+    # ancestors of the base afterwards, so `-d` refuses even though the work
+    # fully landed. This is why every terminal-path caller passes force=True —
+    # with -d the completed-task ref would leak forever.
+    svc = _service()
+    _git(clone, "checkout", "-b", "feature/squashed")
+    (clone / "work.txt").write_text("x")
+    _git(clone, "add", "work.txt")
+    _git(clone, "commit", "-m", "feature work")
+    _git(clone, "checkout", "main")
+    _git(clone, "merge", "--squash", "feature/squashed")
+    _git(clone, "commit", "-m", "squash-merge feature")
+    assert (clone / "work.txt").exists()  # the work landed on main
+
+    await svc.delete_local_branch(clone, "feature/squashed", force=False)
+    assert _ref_exists(clone, "refs/heads/feature/squashed")  # -d refused
+
+    await svc.delete_local_branch(clone, "feature/squashed", force=True)
+    assert not _ref_exists(clone, "refs/heads/feature/squashed")
+
+
+async def test_delete_local_branch_missing_branch_is_clean_skip(clone: Path) -> None:
+    svc = _service()
+    await svc.delete_local_branch(
+        clone, "feature/never-existed", force=False
+    )  # no error
+    await svc.delete_local_branch(
+        clone, "feature/never-existed", force=True
+    )  # no error
diff --git a/tests/unit/services/test_worktree_cleanup_on_complete.py b/tests/unit/services/test_worktree_cleanup_on_complete.py
index 0b38b5ff..c9f5a3d4 100644
--- a/tests/unit/services/test_worktree_cleanup_on_complete.py
+++ b/tests/unit/services/test_worktree_cleanup_on_complete.py
@@ -75,7 +75,7 @@ async def test_complete_removes_assignee_worktree_best_effort() -> None:
     result = await svc.complete(task.id)
 
     assert result is task
-    remove.assert_awaited_once_with(task, "roboco-api")
+    remove.assert_awaited_once_with(task, "roboco-api", force_branch_delete=True)
 
 
 @pytest.mark.asyncio
@@ -149,7 +149,7 @@ async def test_ceo_approve_removes_assignee_worktree_best_effort() -> None:
     result = await svc.ceo_approve(task.id)
 
     assert result is task
-    remove.assert_awaited_once_with(task, "roboco-api")
+    remove.assert_awaited_once_with(task, "roboco-api", force_branch_delete=True)
 
 
 @pytest.mark.asyncio