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Changelog

All notable changes to Taskmaster are documented here.

v4.3.0 — 2026-04-28

Added

  • TASKMASTER_VERIFY_COMMAND env var: opt-in shell verifier that gates stop after the done token is seen. Pairs with test suites, type-checkers, or any repo-local check. Companion knobs: TASKMASTER_VERIFY_TIMEOUT (default 60s), TASKMASTER_VERIFY_MAX_OUTPUT (default 4000 bytes), TASKMASTER_VERIFY_CWD. (T1.1)
  • Tagged hook-injected prompts: every prompt the hook injects starts with [taskmaster:injected v=1 kind=<kind>]. New taskmaster-prompt-detect.sh lib lets downstream consumers distinguish injected reprompts from real user goals. Legacy substring detection preserved for back-compat. (T1.3)
  • JSON session state file at ${TASKMASTER_STATE_DIR:-${TMPDIR}/taskmaster/state}/<session_id>.json, flock-protected, atomic writes. Schema v1 with stop_count, latest_user_prompt, last_verifier_run, metadata fields ready for T2/T3. (T1.2)

Changed

  • Stop-count tracking moved from the bare counter file at ${TMPDIR}/taskmaster/<session_id> to the new JSON state file. Legacy counter files are absorbed on first read and deleted — no user action required. The migration is flock-protected and additive (a peer's increments are not rewound).

References

  • Design: docs/designs/2026-04-28-072245-fork-pattern-adoption.md
  • Plan: docs/plans/2026-04-28-083546-t1-fork-pattern-adoption.md
  • Source review: docs/upstream-reviews/blader-taskmaster-forks.md

[2.4.0] - 2026-03-30

Changed

  • Install script now also copies hook to ~/.claude/hooks/taskmaster-check-completion.sh (user-level hooks directory), consistent with standard Claude Code hook layout.
  • Settings.json registration now points to ~/.claude/hooks/ path by default.
  • Uninstall script updated to clean up from both locations.

[2.3.0] - 2026-02-25

Changed

  • Hook reason field now contains only the TASKMASTER_DONE signal token instead of the full completion checklist. This keeps user-visible terminal output minimal — one collapsed line rather than a wall of text.
  • Full completion checklist lives exclusively in SKILL.md, which is always loaded as system context. The agent already has all instructions; the reason field no longer needs to duplicate them.
  • Added last_assistant_message as the primary done-signal detection path (faster, no transcript file parsing required). Transcript-based check is retained as fallback.
  • Removed HAS_RECENT_ERRORS / stop_hook_active escape-hatch logic in favor of the explicit TASKMASTER_DONE signal protocol.
  • hooks/check-completion.sh brought in sync with root-level canonical source.

[2.2.0] - 2026-02-19

Changed

  • Default TASKMASTER_MAX set to 100 (previously 0 / infinite).
  • Moved full completion checklist from hook reason into SKILL.md system context (first pass; reason still contained a short prompt).
  • install.sh made POSIX-portable (sh shebang, conditional pipefail).

Fixed

  • Resolved infinite loop caused by set -euo pipefail in sh-sourced contexts.

[2.1.0]

Added

  • Session-scoped counter with configurable TASKMASTER_MAX escape hatch.
  • Subagent skip: transcripts shorter than 20 lines are ignored.
  • TASKMASTER_DONE_PREFIX env var for customising the done token prefix.

[2.0.0]

Added

  • TASKMASTER_DONE signal protocol: stop is allowed only after the agent emits TASKMASTER_DONE::<session_id> in its response.
  • Transcript-based done-signal detection.

[1.0.0]

Added

  • Initial release: stop hook that blocks agent from stopping prematurely.
  • Completion checklist injected via hook reason field.
  • TASKMASTER_MAX loop guard.