feat: compaction-resilient session state (Claude Code + Codex)#15
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gabelul wants to merge 2 commits into
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feat: compaction-resilient session state (Claude Code + Codex)#15gabelul wants to merge 2 commits into
gabelul wants to merge 2 commits into
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May 25, 2026 23:46
Active project, generated screens, and the PRD draft now survive a host context compaction instead of living only in the conversation. - scripts/stitch-session.mjs: one canonical state writer (CLI + helpers) - hooks/: PreCompact snapshots a transcript backstop and breadcrumb; SessionStart re-orients the model on source=compact via additionalContext - stitch-ideate / stitch-orchestrator: persist state as they go, plus a resume self-check for hosts where the hooks aren't trusted yet (Codex) - on-PATH 'stitch-session' launcher (npm bin + installer symlink) so Codex skills, which can't reference a bundled script, can still write state - .codex-plugin/ manifest so the hooks register under Codex CLI State values are sanitized before context injection, the hooks always exit 0 (never block compaction), and the launcher's main-guard resolves symlinks.
Sharpens the 'honest limitations' framing in both the PR body and the feature doc: the mid-phase reasoning loss isn't 'covered by the transcript backstop', it's a real gap whose proper fix is the exec plans pattern. Adds docs/dev-docs/exec-plans-followup.md with the planned shape: .stitch/session/plan.md with five sections (Purpose / Progress / Surprises / Decision Log / Outcomes), written at decision points via the ss wrapper. Designed not built; the current PR stays scoped. Pattern from https://developers.openai.com/cookbook/articles/codex_exec_plans
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Why
The orchestrator/ideate flows run inside a host (Claude Code, Codex) that compacts the conversation when its context window fills. Today most of the work survives by luck — the PRD is on disk, screens live in Stitch's backend — but a long ideation session loses its gathered research, because the PRD only gets written at the final phase. This makes the resilience deliberate instead of accidental, and ports it to Codex too.
How — two layers
State lives outside the conversation. One canonical writer,
scripts/stitch-session.mjs, owns.stitch/session/state.json(active project, generated screens, applied design system, artifact pointers) and a runningprd-draft.md.stitch-ideateflushes after each phase;stitch-orchestratorrecords the project/screens/design-system as it goes.Hooks re-orient after a compaction.
PreCompactsnapshots the raw transcript (owner-only) and aRESUME.mdbreadcrumb;SessionStart(source: compact) injects a "you're mid-flow, re-read this, don't restart" line viaadditionalContext. Both no-op silently when there's no Stitch session and always exit 0.Host support
hooks/hooks.json; skills reach the helper via${CLAUDE_SKILL_DIR}..codex-plugin/plugin.json). Codex firesSessionStart:compacttoo and providesCLAUDE_PLUGIN_ROOTas a compat env var, so the samehooks.jsonworks. Codex skills can't reference a bundled script, so the helper is exposed as an on-PATHstitch-sessioncommand (npmbin+ installer symlink); skills call it through a wrapper that falls back to the Claude Code path, and self-recover viass readwhen hooks aren't trusted yet.Reviewed
OMC code-reviewer (APPROVE) + a Codex second opinion. Security model holds — state values are sanitized before context injection, no path traversal in snapshot filenames, no shell/JSON injection. The symlink main-guard bug (npm
binis a symlink, so a naiveimport.meta.url === argv[1]silently skippedmain()) was caught and fixed withrealpathSync.Verify before merge (live hosts — can't be tested offline)
/compactmid-flow → next turn knows the projectcodex plugin add ., trust the hooks,/compact→ re-orientation fires and${CLAUDE_PLUGIN_ROOT}resolvesHonest limitations
prd-draft.md. Tracked as a follow-up indocs/dev-docs/exec-plans-followup.md; the raw-transcript backstop insnapshots/is the recoverable-but-ugly stopgap until that lands.PostCompactstdout is ignored, so re-orientation rides onSessionStart:compact, notPostCompact.Details:
docs/compaction-resilience.md. Landmines:docs/dev-docs/troubleshooting.md.