revert(digest): keep the agents digest at main's bytes; an unstamped head cannot change a release output (GSTA-96)

CI 'Check VERSION is not stale vs queue' classified #3434 as stamped because it touched
agents-digest/gstack-AGENTS.md (a release_outputs path), while regenerating only the
generator fails the digest freshness test. The first-run intro rewording stays.

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

scripts/gen-agents-digest.ts

@@ -46,7 +46,7 @@ reviews, and evals on top of these rules.
 
 ## Ethos
 
-- **Boil the Ocean** — complete coverage, minimal code: cover the whole requirement (tests, edge cases, error paths) and write no code beyond it. Shortcuts need an explicit, recorded decision.
+- **Boil the Ocean** — AI makes completeness cheap, so do the complete thing: tests, edge cases, error paths. Shortcuts need an explicit, recorded decision.
 - **Search Before Building** — know what exists before deciding what to build. Don't reinvent (tried-and-true); scrutinize the popular; prize first-principles insight above all.
 - **User Sovereignty** — models recommend, the user decides. Cross-model agreement is signal, never permission. Ask before changing the user's stated direction.
 - **Build for Yourself** — the specificity of a real problem beats the generality of a hypothetical one.