name: progress-addendum description: Add an append-only Addendum section to DONE progress files (top-of-file), with audit + template scripts to keep archived docs from going stale.

Progress Addendum (post-DONE updates)

Contract

Prereqs:

• Run inside the target git repo (any subdir is fine).
• git available on PATH.
• python3 available on PATH.

Inputs:

• A progress file path under docs/progress/**/*.md (typically docs/progress/archived/<YYYYMMDD>_<slug>.md).
• Update date (YYYY-MM-DD; default: today) and the addendum content you will fill in.

Outputs:

• Progress file updated with a ## Addendum section placed immediately after Links: (before ## Goal).
• Updated date updated (only when adding an addendum entry).
• Audit script exits non-zero and prints errors to stderr when conventions are violated.

Exit codes:

• 0: success
• non-zero: invalid args, missing file, malformed progress file, or audit failures

Failure modes:

• Progress file missing the canonical Links: section.
• Multiple ## Addendum sections detected.
• File status is not DONE (unless --allow-not-done is set).
• ## Addendum exists but is not the first ## ... section after Links:.

Principles (3a: append-only at the top)

• Goal: prevent DONE progress files from going stale without rewriting history.
• Canonical placement: ## Addendum lives immediately after Links: and before the rest of the document (typically ## Goal).
• Post-DONE edits should be limited to:
  • ## Addendum (append-only notes)
  • the header table’s Updated date (to reflect the addendum entry)
• If the change is large, prefer creating a new progress file / PR and link it from the Addendum instead of editing the original Goal / Acceptance Criteria / Scope / Steps.

Entry format (recommended)

### YYYY-MM-DD

- Change: ...
- Reason: ...
- Impact: ...
- Links: ...

Scripts

• Add a new entry template into a DONE progress file (and bump Updated):
  • $CODEX_HOME/skills/workflows/pr/progress/progress-addendum/scripts/progress_addendum.sh --file docs/progress/archived/<file>.md
• Add an entry and link to an existing follow-up progress file:
  • $CODEX_HOME/skills/workflows/pr/progress/progress-addendum/scripts/progress_addendum.sh --file docs/progress/archived/<file>.md --followup-progress docs/progress/<YYYYMMDD>_<slug>.md
• Create a new follow-up progress file (skeleton) and link it from the Addendum entry:
  • $CODEX_HOME/skills/workflows/pr/progress/progress-addendum/scripts/progress_addendum.sh --file docs/progress/archived/<file>.md --followup-title "<short title>"
• Ensure a DONE file has ## Addendum (insert - None if missing; does not change Updated):
  • $CODEX_HOME/skills/workflows/pr/progress/progress-addendum/scripts/progress_addendum.sh --file docs/progress/archived/<file>.md --ensure-only
• Print a copy/paste entry template (no file edits):
  • $CODEX_HOME/skills/workflows/pr/progress/progress-addendum/scripts/progress_addendum.sh --print-entry
• Audit progress files for Addendum placement/format:
  • $CODEX_HOME/skills/workflows/pr/progress/progress-addendum/scripts/audit_progress_addendum.sh
  • Optional stricter checks:
    • .../audit_progress_addendum.sh --require-addendum --check-updated
    • .../audit_progress_addendum.sh --require-links
    • .../audit_progress_addendum.sh --require-progress-link