Addresses the pre-landing review findings (all INFORMATIONAL, no criticals):
- security: datamark resurfaced decision text at the render boundary
(lib/gstack-decision.ts datamark() — neutralizes code fences, --- banners,
<|role|>/</system> markers, control chars, newlines). Applied in
gstack-decision-search human output so stored text can't masquerade as
instructions in Context Recovery (codex hardening #3 / AC #7). --json stays raw.
- DRY: extract resolveSlug/gitBranch/flagValue to lib/bin-context.ts; both
decision bins use it instead of duplicating the helpers.
- compact(): batch the archive append (one write, not N) and shrink the
mid-compact crash window; simplify the opaque branch/issue ternary.
- coverage: learnings-log injection rejection (D2A wiring), search --recent/
--scope + NaN-safe --recent, datamark-applied, unparseable lock body,
compact-empty, corrupt-snapshot degrade.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Garry Tan