Taskmaster

Taskmaster is a completion guard for coding agents.

It addresses a common failure mode: the agent makes partial progress, writes a summary, and stops before the user goal is actually finished.

Philosophy

Taskmaster is built around one idea: progress is not completion.

• Evidence over narrative: The agent should not be allowed to stop based on a convincing summary alone. Completion must be explicit and machine-checkable.
• Same-session recovery: When a turn is incomplete, the right move is to continue in the same running session, not restart from scratch.
• Goal re-anchoring: Compliance prompts force the model back to the user’s actual request, not its own local notion of “good enough”.
• Automation-safe signaling: A deterministic done token makes completion parseable for wrappers and CI-style flows.

Core Contract

A run is complete only when the assistant emits:

TASKMASTER_DONE::<session_id>

If that token is missing at stop time, Taskmaster blocks stop and pushes the current turn to continue. Codex monitoring stays active for later turns in the same long-lived session.

Enforcement Prompt

Taskmaster uses one shared compliance prompt for both Codex and Claude.

• Codex: the wrapper/injector path injects this shared prompt back into the same running session when stop conditions are not met.
• Claude: the Stop hook returns this same shared prompt as the block reason.

The shared prompt source lives in taskmaster-compliance-prompt.sh.

How It Works

• Codex path:
  • Runs through a wrapper (codex shim / codex-taskmaster launcher).
  • Enables Codex session logs.
  • Watches task_complete / turn_complete events.
  • If done token is missing, injects a continuation prompt into the same running Codex process via expect PTY.
  • A done token suppresses injection for that completed turn only; it does not permanently disable Taskmaster for future turns in the same session.
• Claude path:
  • Registers a Stop command hook.
  • Hook runs check-completion.sh.
  • If done token is missing, the stop is blocked with corrective feedback.

Install

bash ~/.codex/skills/taskmaster/install.sh

Auto-detection behavior:

• Installs Codex integration when codex or ~/.codex exists.
• Installs Claude integration when claude or ~/.claude exists.
• If both are present, installs both.
• If neither is detected, defaults to both.

Optional target override:

TASKMASTER_INSTALL_TARGET=codex bash ~/.codex/skills/taskmaster/install.sh
TASKMASTER_INSTALL_TARGET=claude bash ~/.codex/skills/taskmaster/install.sh
TASKMASTER_INSTALL_TARGET=both bash ~/.codex/skills/taskmaster/install.sh

Installed artifacts:

• Codex:
  • ~/.codex/skills/taskmaster/
  • ~/.codex/bin/codex-taskmaster
  • ~/.codex/bin/codex (shim to Taskmaster wrapper)
• Claude:
  • ~/.claude/skills/taskmaster/
  • ~/.claude/hooks/taskmaster-check-completion.sh
  • Stop-hook entry added to ~/.claude/settings.json

Usage

Codex

Run normally:

codex [args]

Explicit alias is also available:

codex-taskmaster [args]

Interactive resume is also supported:

codex resume [session-or-thread]

Claude

Run Claude normally after install. Taskmaster hook enforcement is automatic.

Configuration

• TASKMASTER_MAX (default 0):
  • Limits stop-block warnings in hook checks.
  • 0 means unlimited warnings.

Uninstall

bash ~/.codex/skills/taskmaster/uninstall.sh

Auto-detection behavior mirrors install and removes Taskmaster from detected Codex/Claude environments.

Optional target override:

TASKMASTER_UNINSTALL_TARGET=codex bash ~/.codex/skills/taskmaster/uninstall.sh
TASKMASTER_UNINSTALL_TARGET=claude bash ~/.codex/skills/taskmaster/uninstall.sh
TASKMASTER_UNINSTALL_TARGET=both bash ~/.codex/skills/taskmaster/uninstall.sh

Requirements

• bash
• jq
• Codex integration:
  • Codex CLI
  • expect
• Claude integration:
  • Claude Code with Stop hooks enabled
  • python3 (for install/uninstall settings updates)

License

MIT