ci: adopt the inline pr-agent lane — a public repo cannot call a private reusable workflow

CHANGELOG.md

@@ -6,6 +6,32 @@ All notable changes to this project are documented here. The format is based on
 
 ## [Unreleased]
 
+### Fixed
+
+- `pr-agent` lane: fork-triggered `/` commands are now refused, and the AI
+  call's budget fits inside its step. Three defects, one of them only visible
+  once the first was fixed.
+
+  The job-level `if:` refused forks on the `pull_request` arm and could not on
+  `issue_comment` — fork status is absent from that payload, so there was never
+  an expression to write. A `fork gate` step now asks the pulls endpoint and
+  fails closed: only a literal `false` proceeds, so a 404, a rate limit or a
+  deleted fork all skip. The lane runs no `actions/checkout`, so fork code was
+  never executed and no exfiltration path existed; what this closes is the
+  comment claiming forks were already skipped, which was true of one arm only.
+
+  `CONFIG__AI_TIMEOUT` was 600s inside a 360s step, so the runner killed the
+  step before pr-agent could reach its own timeout or fall back to a secondary
+  model. Now 300s.
+
+  Fixing the first exposed a third: `stamp attempt 2 end` runs under
+  `if: always()`, so when attempt 2 never ran the verdict subtracted from zero
+  and reported a 1787580408-second attempt as a confident TIMED OUT.
+
+  Contributors on forks are affected: a maintainer's `/review` on a fork PR is
+  now declined with a warning rather than silently running.
+  (wave-av/wave-foundation-public#73)
+
 ### Added
 - **`wave compose "<intent>"`** calls `POST /v1/compose` through the existing `getClient()` /
   auth / error plumbing (no new HTTP stack) and prints a markdown rendering of the proposal: