Spec Update Skill

Synchronize spec documents with actual project state by analyzing git commits and working directory changes.

Command Syntax

/spec.update [spec-path] [--mode=status|content|full] [--context="user instructions"]

Arguments:

• spec-path (optional): Path to spec file. If omitted, finds most recent in ./specs/active/*/
• --mode (optional):
  • status (default): Update completion status only
  • content: Update spec structure based on learnings
  • full: Both status and content updates
• --context (optional): Manual overrides/clarifications

Core Workflow

Step 1: Locate and Parse Spec

1. Find spec file:

   • If path provided: use that
   • Else: search ./specs/active/**/spec.md for most recent

2. Parse structure:

   • Identify task format (checkboxes, numbered lists, sections)
   • Extract tasks with current status
   • Preserve formatting

3. Determine baseline:

   • Use file creation time or first commit mentioning spec

Step 2: Analyze Current State

Run git commands to gather evidence:

# Commits since plan creation
git log --oneline --since="<plan-creation-time>" --all
git log --stat --since="<plan-creation-time>" --all

# Current state
git status --short
git branch -vv

# Files changed since baseline
git diff <baseline>..HEAD --name-status

Collect:

• Commits that map to plan tasks
• Files created/modified/deleted
• Working directory changes
• Branch/sync status

Step 2.5: Sync TodoWrite to tasks.yaml (if active)

If TodoWrite has entries matching spec tasks:

1. For each "completed" todo, update corresponding task in tasks.yaml to status: completed
2. For each "in_progress" todo, update to status: in_progress
3. Update meta.last_updated and meta.progress fields

This catches any completions that weren't synced immediately during task execution.

Step 3: Map Evidence to Tasks

For each task:

1. Search for evidence:

   • Commit messages mentioning task
   • Files mentioned in task were modified
   • Tests exist if task mentions testing
   • Dependencies met

2. Determine status:

   • completed: Clear evidence in commits + files exist
   • in_progress: Working directory changes or partial completion
   • pending: No evidence
   • blocked: Explicit context or dependencies not met (add to task's blocked_by field)

3. Collect evidence notes:

   • Which commits
   • Which files changed
   • Test/build results

Step 4: Update tasks.yaml

Status mode (--mode=status):

Update task statuses and add evidence:

tasks:
  - id: PROJ-001
    content: Set up project structure
    status: completed
    active_form: Setting up project structure
    evidence:
      commits: [c228fea, 2f069d7]
      files: [src/feature_link/temporal.py, tests/test_errata_example.py]

  - id: PROJ-002
    content: Implement core logic
    status: in_progress
    active_form: Implementing core logic
    evidence:
      notes: "3 files changed in working directory"

  - id: PROJ-003
    content: Write integration tests
    status: pending
    active_form: Writing integration tests

meta:
  last_updated: 2025-12-17
  progress: 1/3

Content mode (--mode=content):

Also update structure:

• Add new tasks via dignity's add_task() function
• Update task content/active_form via update_task()
• Remove obsolete tasks via discard_task()
• Update phases and checkpoints as needed

User context: If --context provided, apply manual overrides (takes precedence over auto-detection).

Step 5: Present Summary

## Spec Update Summary

Spec: ./specs/active/refactor/
Tasks: tasks.yaml (progress: 5/10)
Baseline: c228fea (2025-11-06)

Status:
  ✓ Completed: 5 tasks
  • In Progress: 2 tasks
  ○ Pending: 3 tasks

Recent Activity:
  - 8 commits since plan creation
  - 12 files modified

Next actions:
  1. REFAC-006: Implement validation (ready)
  2. REFAC-007: Add error handling (ready)

---

Matching Heuristics

Strong evidence (auto-mark complete):

• Commit message explicitly references task
• Commit modifies exact files mentioned
• All acceptance criteria met

Weak evidence (mark in-progress):

• Commit touches related files
• Working directory has related changes
• Partial completion of multi-step task

Conservative approach: When uncertain, prefer in-progress over completed

Best Practices

Preserve Structure

• Keep all non-task content unchanged
• Maintain indentation and formatting
• Append evidence (don't remove existing notes)
• Don't remove user comments

Handle tasks.yaml Structure

• Core fields: spec, code, next_id, tasks
• Task statuses: pending, in_progress, completed
• Optional: phases with checkpoints
• Optional: evidence (commits, files, notes)

Examples

# Update most recent spec status
/spec.update

# Full update with content changes
/spec.update --mode=full

# Manual override for blocker
/spec.update --context="Task 5 blocked waiting for API docs"

# Specific spec
/spec.update ./specs/active/auth/spec.md --mode=full

---

Integration

• Created by /spec.create
• Updated regularly as work progresses
• Provides visibility into completion status
• Informs /spec.archive decision

Best practice: Run at end of each work session to keep synchronized with reality.