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v1.0.120 — scoped ctx_purge

Hotfix landing the deferred Issue [#520] (scoped ctx_purge with sessionId / scope parameters), reported by @murataslan1. Fully additive — existing {confirm: true} callers still work but emit a one-release deprecation warning.

What changed

[#520] — scoped ctx_purge

The previous schema was { confirm: boolean }, which always wiped the entire project (FTS5 store + sessionsDir + stats file). v1.0.120 adds two optional parameters:

  • sessionId?: string — UUID of a single session. Deletes only that session's events row + per-session FTS5 chunks. Preserves stats file and sibling sessions.
  • scope?: "session" | "project" — explicit scope selector.

Refusal rules (MUST language)

The new schema is strict to prevent accidental project-wide wipes:

Invocation Behavior
{ confirm: true, sessionId: "uuid" } ✅ Wipes ONLY that session
{ confirm: true, scope: "project" } ✅ Wipes ENTIRE project (KB + sessions + stats)
{ confirm: true } (bare) ⚠️ Treated as scope: "project" + deprecation warning to stderr
{ confirm: true, sessionId: "...", scope: "project" } ❌ REFUSED — ambiguous
{ confirm: false, ... } ❌ REFUSED — destructive op requires confirm

The MCP tool description was rewritten in contract style with MUST/MUST NOT language and explicit examples so calling LLMs do not confuse the two modes.

Tests

8 new vertical TDD slices in tests/session/purge-session.test.ts:

  • refuses ambiguous combinations
  • per-session SQL delete on session_events
  • per-session FTS5 chunk delete with sibling preservation
  • stats file preserved on scope:"session"
  • backward compat: bare {confirm:true} matches today's behavior + emits warning
  • handler-level scope-gate assertion

Compatibility

15 adapters / 3 OS. No breaking changes — bare {confirm:true} still works through the deprecation cycle. v1.0.121 will require explicit scope.

Upgrade

:::bash
npm install -g context-mode@latest
# inside Claude Code:
/ctx-upgrade
# restart your session

Thanks

@murataslan1 — well-structured Observed/Expected/Repro/Suggested-fix report that scoped the design space cleanly. Ship in v1.0.120 (deferred from v1.0.119 to keep the bug ship focused).

Source: README.md, updated 2026-05-11