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fix: record OAuth-host verification + models.json SPOT for usage-probe/default (#112) (#119)

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Three alignment/SPOT findings from the 2026-05-31 audit:

1. The OAuth token-refresh host (platform.claude.com/v1/oauth/token, a Class A
   surface) was introduced in the 2026-04-11 drift commit and had no verification
   record. Verified against the compiled cli.js (claude.exe v2.1.154) via `strings`:
   OAUTH_TOKEN_URL and OAUTH_CLIENT_ID both appear in the binary byte-for-byte (in
   the same `prod` config object), and the legacy host console.anthropic.com/v1/oauth
   is absent (0 hits). Recorded this as an inline ALIGNMENT citation comment above the
   constants. No live OAuth probe was run — a refresh-token grant would rotate the
   operator's real credentials; the strings-on-binary evidence is decisive.
   (cli.js: verified against compiled claude.exe v2.1.154, 2026-05-31.)

2. fetchUsageFromApi() hardcoded the haiku model ID; now derives from
   modelsConfig.aliases.haiku (ADR 0003 SPOT). Prevents a silent /usage break on a
   future haiku ID bump.

3. [P3] The default request model hardcoded the sonnet ID; now derives from
   modelsConfig.aliases.sonnet (ADR 0003 SPOT).

Both SPOT values are byte-identical to the literals they replace today, so zero
behavior change — only drift-resistance. The alignment.yml blacklist pin for the
wrong-host variant was deliberately NOT included here: extending the blacklist is a
governance-layer change (alignment.yml inline policy) and belongs in its own PR.

ALIGNMENT.md: finding 1 IS the verification (cli.js citation recorded inline);
findings 2-3 are SPOT hygiene that forward no new operation. No blacklisted tokens or
port literals introduced; alignment.yml passes.

Independent fresh-context reviewer (opus) INDEPENDENTLY re-ran `strings` on the binary
and confirmed the host/client_id present and the legacy host absent — APPROVE (Iron
Rule 10; alignment hard-requirement #3 satisfied).

Closes #112.

Co-authored-by: dtzp555 <dtzp555@gmail.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
dtzp555-max
2026-05-31 22:44:15 +10:00
committed by GitHub
co-authored by taodeng Claude Opus 4.8
parent c3b1f32c86
commit 4a7d79c330
3 changed files with 33 additions and 2 deletions
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CHANGELOG.md
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@@ -2,6 +2,10 @@
## Unreleased
### Fix
- **#112** — Recorded OAuth-host verification against compiled cli.js v2.1.154 (ALIGNMENT Class A); usage-probe and default request model now derive from `models.json` (ADR 0003 SPOT) instead of hardcoded IDs.
### Security
- **#109 P0** — `/health` no longer advertises `PROXY_ANONYMOUS_KEY` to remote callers by default. The `anonymousKey` field is now gated behind a new `PROXY_ADVERTISE_ANON_KEY=1` opt-in env var; localhost callers are always exempt. This prevents any LAN-reachable device from harvesting a working bearer credential from the unauthenticated `/health` endpoint.