Run Tasks Skill

This skill orchestrates autonomous task execution using Claude Code's native Agent Team system. It takes tasks produced by /create-tasks, builds a dependency-aware execution plan, and executes them in waves via a 3-tier agent hierarchy: Orchestrator (this skill) plans and coordinates waves, Wave Leads manage parallel executors within each wave, and Context Managers handle knowledge flow between tasks.

The wave-lead creates its own team and coordinates teammates via SendMessage. The orchestrator communicates with the wave-lead via file-based summaries (wave-{N}-summary.md).

Load Reference Skills

Before executing any step, load the foundational references for task management and team orchestration:

Tasks Reference

Read ${CLAUDE_PLUGIN_ROOT}/../claude-tools/skills/claude-code-tasks/SKILL.md

Teams Reference

Read ${CLAUDE_PLUGIN_ROOT}/../claude-tools/skills/claude-code-teams/SKILL.md

These references provide tool parameters, lifecycle rules, messaging protocols, and orchestration patterns. The SDD-specific execution procedures are in the orchestration reference below.

Orchestration Patterns Reference (optional, for context)

Read ${CLAUDE_PLUGIN_ROOT}/../claude-tools/skills/claude-code-teams/references/orchestration-patterns.md

Orchestration Reference

Read ${CLAUDE_PLUGIN_ROOT}/skills/run-tasks/references/orchestration.md

If any reference file cannot be read, stop and report: "ERROR: Cannot load required reference. Verify the plugin installation is complete."

Argument Parsing

Parse the following arguments from the user's invocation:

When both --task-group and --phase are provided, both filters apply (intersection). CLI args --max-parallel and --retries take precedence over settings file values.

Validation:

• --phase values must be positive integers. If a non-integer value is provided (e.g., --phase abc), report: "Invalid --phase value: must be comma-separated positive integers (e.g., --phase 1,2)." and stop.
• --max-parallel must be a positive integer. If invalid, report: "Invalid --max-parallel value: must be a positive integer." and stop.
• --retries must be a non-negative integer. If invalid, report: "Invalid --retries value: must be a non-negative integer." and stop.
• If <task-id> is provided alongside --task-group or --phase, report: "Cannot combine task ID with --task-group or --phase filters." and stop.
• If no tasks match the applied filters, report the available values. For --phase: "No tasks found for phase(s) {N}. Available phases: {sorted distinct spec_phase values}." For --task-group: "No tasks found for group '{name}'. Available groups: {sorted distinct task_group values}."

7-Step Orchestration Loop

Step 1: Load & Validate

Load the full task list via TaskList. Apply --task-group and --phase filters if provided. Validate the resulting task set:

• Empty task list: Suggest running /create-tasks first.
• All tasks completed: Report summary with completion counts and stop.
• No unblocked tasks: Report the blocking chains preventing progress.
• Circular dependencies: Detect cycles, break at the weakest link (task with fewest blockers), and warn the user in the execution plan.

See references/orchestration.md Step 1 for the full procedure.

Step 2: Configure & Plan

Read settings from .claude/agent-alchemy.local.md (use defaults if the file is missing). Build the execution plan:

1. Topological sort: Assign tasks to waves based on dependency levels. Wave 1 = tasks with no unmet dependencies. Wave N = tasks whose blockers are all in earlier waves or already completed.
2. Priority ordering within waves: Sort by priority (critical > high > medium > low > unprioritized), break ties by "unblocks most others."
3. Wave capping: Each wave limited to max_parallel tasks (default: 5, configurable via settings).

See references/orchestration.md Step 2 for settings and the full planning procedure.

Step 3: Confirm

Present the execution plan to the user via AskUserQuestion:

• Total task count, wave count, and estimated team composition per wave. For waves with task count >= context_manager_threshold: 1 wave-lead + 1 context-manager + N executors. For smaller waves: 1 wave-lead + N executors (no CM).
• Per-wave breakdown with task subjects, priorities, and model tiers. Waves that skip CM are annotated with "(no context manager)".
• Any circular dependency warnings or broken links.

If --dry-run: Display the full plan details (wave breakdown, task assignments, model tiers, timeout estimates) and exit. No TaskUpdate calls, no session directory created, no agents spawned.

If the user cancels: Clean exit with no tasks modified.

See references/orchestration.md Step 3 for display format details.

Step 4: Initialize Session

Create the session directory and handle interrupted session recovery:

1. Generate session ID: {task-group}-{YYYYMMDD}-{HHMMSS} (or exec-session-{YYYYMMDD}-{HHMMSS} if no group).
2. Check for existing __live_session__/ content: If found, offer the user a choice via AskUserQuestion: resume (reset in_progress tasks to pending) or fresh start (archive to .claude/sessions/interrupted-{timestamp}/).
3. Create session artifacts in .claude/sessions/__live_session__/:
   • execution_context.md — empty template
   • task_log.md — header row only
   • execution_plan.md — populated from Step 2
   • progress.jsonl — session_start event

See references/orchestration.md Step 4 for the full initialization procedure and session ID generation rules.

Step 5: Execute Waves

For each wave in the execution plan:

1. Refresh unblocked tasks via TaskList (dynamic unblocking after prior wave completions).
2. Launch wave-lead as a foreground subagent via Task (no team_name — the wave-lead creates its own team internally).
3. Read wave summary file from {session_dir}/wave-{N}-summary.md after the foreground Task completes.
4. Process wave summary: Update task_log.md, write wave_complete event to progress.jsonl, handle Tier 3 escalations (present failures to user via AskUserQuestion with options: Fix manually, Skip, Provide guidance, Abort).
5. Verify cleanup: Check that the wave-lead deleted its team. If the team directory still exists, force-stop any survivors via TaskStop. Includes inter-wave verification and cooldown before starting the next wave.
6. Repeat until no more unblocked tasks remain.

See references/orchestration.md Step 5 for the full wave execution procedure, retry escalation flow, and wave-lead crash recovery.

Step 6: Summarize & Archive

Generate a session summary and archive the session:

• Write session_summary.md with pass/partial/fail/skipped counts, total execution time, per-wave breakdown, failed task list with reasons, and key decisions made during execution. PARTIAL tasks (core functionality works, non-cr