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DuncanandWill Pfleger
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Phase 0 of the cross-workspace agent library (spec §2.7) — the compatibility seam that lets §3's library machinery land without a data-loss regression. No library code exists yet; this is the pure refactor that makes every persona writer merge-preserving by construction. - `ManagedAgentRecord` gains `library_ref` / `library_applied_revision` (§2.6), both `#[serde(default, skip_serializing_if)]` so records without them stay byte-identical to head. Only §3 authors them. - `apply_definition_view` writes ONLY the view-carried slots onto a canonical raw record, so any record-only field survives an unrelated save. At head, `save_personas` reconstructed every record wholesale through `into_agent_record`, silently erasing such fields on every other definition. - `save_personas[_at]` now merges views onto existing raw records by slug via `merge_preserving_definitions`; a genuinely new persona is still projected fresh. Loader signatures are untouched (P5-I2). - `load_persona_views[_at]` + `PersonaView` (flattened wire, skip-none) expose the library metadata at the list/get command boundary; `list_personas` returns `PersonaView`. The ~78 non-command readers keep the flat loader. - Two preservation tests: every writer shape through the in-memory seam, and a full on-disk save/reload cycle through `_at` plus the read-side exposure. The `AgentDefinition <-> ManagedAgentRecord` conversions move to a new `types/conversions.rs` submodule (following the existing `types/` split), which keeps `types.rs` under the 1000-line file-size cap after the two new fields. Co-authored-by: Will Pfleger <pfleger.will@gmail.com> Signed-off-by: Will Pfleger <pfleger.will@gmail.com>