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ee9690a93c
emit structured JSON diagnostics when NIP-OA owner-auth extraction fails
during `buzz agents archive`/`unarchive`
## Problem
When owner-auth extraction returned `None`, the CLI silently sent a bare
request. The relay replied with `400: missing auth tag` and the caller
had no way to know why extraction failed.
## Solution
Extract `resolve_auth_from_profile` — a sync function that owns all
three warning branches and the success path. `resolve_auth` reduces to:
self-check → fetch kind:0 → delegate.
- **Four distinct diagnostics**: no kind:0 profile / no tags array /
`classify_owner_auth_tag` failure (typed `AuthFailure` enum:
`NoAuthTag`, `AmbiguousAuthTag`, `WrongArity`, `NonStringElement`,
`InvalidOwnerHex`, `InvalidSigHex`, `OwnerMismatch`)
- **JSON format**: each fallback emits exactly one `{"warning":"..."}`
line to stderr, matching the CLI's documented structured-stderr contract
and the precedent in `channels.rs:597`
- **Relay-supplied values** (target pubkey, actual owner pubkey) pass
through `serde_json` serialization — no unescaped text
- **Admin bare path preserved**: request is always sent after the
warning; bare non-self requests are legitimate for relay admins
- **Self path unchanged**: silent, no relay query
## Boundary tests
Tests call `resolve_auth_from_profile` directly with `&mut Vec<u8>`.
Each of the three production `writeln!` calls is covered: deleting any
one fails at least one test. Success path asserts zero bytes written.
## Changes
`crates/buzz-cli/src/commands/agents.rs` only:
- `AuthFailure` enum with `message()` formatter
- `classify_owner_auth_tag` returning `Result<[String;4], AuthFailure>`
- `extract_owner_auth_tag` reduced to `#[cfg(test)]` `.ok()` wrapper
- `resolve_auth_from_profile` sync helper (testable without
`BuzzClient`)
- `resolve_auth` reduced to self-check + fetch + delegate
- 9 new boundary tests replacing the prior test-local helper
---------
Signed-off-by: Will Pfleger <pfleger.will@gmail.com>
Co-authored-by: npub1mn7jgtj4w2pd0g0zeuhxsa6jy6p0rewxz4kujt98my82ahfmp72sxjexk7 <dcfd242e557282d7a1e2cf2e6877522682f1e5c6156dc92ca7d90eaedd3b0f95@buzz.block.builderlab.xyz>