…d two-pass Codex search strategy with deterministic fallback behavior,
and remove an obsolete prompt file that was no longer used.
### Changes
- Updated `workflows/issue-deduplicator.yml`:
- Added richer issue input fields (`state`, `updatedAt`, `labels`) for
model context.
- Added two candidate pools:
- `codex-existing-issues-all.json` (`--state all`)
- `codex-existing-issues-open.json` (`--state open`)
- Added body truncation during JSON preparation to reduce prompt noise.
- Added **Pass 1** Codex run over all issues.
- Added normalization/validation step for Pass 1 output:
- tolerant JSON parsing
- self-issue filtering
- deduplication
- cap to 5 results
- Added **Pass 2 fallback** Codex run over open issues only, triggered
only when Pass 1 has no usable matches.
- Added normalization/validation step for Pass 2 output (same
filtering/dedup/cap behavior).
- Added final deterministic selector:
- prefer pass 2 if it finds matches
- otherwise use pass 1
- otherwise return no matches
- Added observability logs:
- pool sizes
- per-pass parse/match status
- final pass selected and final duplicate count
- Kept public issue-comment format unchanged.
- Added comment documenting that prompt text now lives inline in
workflow.
- Deleted obsolete file:
- `/prompts/issue-deduplicator.txt`
### Behavior Impact
- Better duplicate recall when broad search fails by retrying against
active issues only.
- More deterministic/noise-resistant output handling.
- No change to workflow trigger conditions, permissions, or issue
comment structure.
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