docs.sync

A documentation check that compares the codebase with its written documentation. It treats the implementation—the code that actually runs—as the reference for APIs, settings, and behavior.

In plain words
What is it for?
Use it to sync changed files, inspect the whole codebase, or focus on one component such as authentication. It creates a discrepancy report and can update simple documentation fixes after review.
Why use it?
Documentation often becomes inaccurate as code changes. This command reports missing, incorrect, outdated, or undocumented details and presents choices for handling each difference.

Command

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/ddunnock/claude-plugins/docs.sync
Clone the repo
git clone --depth 1 https://github.com/ddunnock/claude-plugins
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 310 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00310
Opus 5 $0.00000 $0.00155
Sonnet 5 $0.00000 $0.00062
Haiku 4.5 $0.00000 $0.00031

Measured 2d ago against content hash 59b2af24022b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

docs.sync scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/documentation-architect/commands/docs.sync.md · 41 lines

What it actually says

Walk codebase, sync documentation with implementation reality.

Before Starting

Read and internalize the behavioral constraints in GUARDRAILS.md.

Documentation drifts from reality during implementation. This command bridges that gap by treating code as source of truth.

Modes

  • Default: Incremental sync (changed files)
  • --walkthrough: Full code exploration
  • --component auth: Specific component

Workflow

  1. Code walkthrough (analyze implementation)
  2. Extract reality (APIs, configs, behavior)
  3. Compare to existing documentation
  4. Generate discrepancy report
  5. Present update options per finding:
    • Auto-update: Apply simple fixes
    • Manual review: Complex changes
    • Skip: Acknowledge, don't change
    • Code issue: Doc is correct, code needs fix
  6. Update memory files with code snapshot

Discrepancy Types

Type Severity Example
MISSING HIGH Public API not documented
INCORRECT HIGH Doc says 201, code returns 200
OUTDATED MEDIUM References deprecated endpoint
UNDOCUMENTED MEDIUM Public function lacks docstring

Outputs

  • docs/_meta/sync-report.md
  • .claude/memory/docs-codebase-snapshot.md
  • Updated documentation

Guardrails

  • Always safe, produces comparison, user chooses updates
  • No assumptions without approval
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 41 lines · 0 tokens per session scan A 59b2af24022b

Subscribe to this mod's changes

docs.sync is a command published in the GitHub repository ddunnock/claude-plugins (12 stars, last pushed 5mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 310 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.