A skill that compares a code domain with its DOMAIN.md documentation and proposes changes as a diff. A diff is a reviewable list of additions, removals, and edits.

Use it after substantial domain changes, during reviews, or before a release to check one domain or all domains.

It helps find documentation that no longer matches the code while leaving the final decision and writing to a human.

How AlexisMarasigan/db2st-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to AlexisMarasigan/db2st-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/AlexisMarasigan/db2st-mcp/main/.claude/skills/sync-domain/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/AlexisMarasigan/db2st-mcp

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/alexismarasigan/db2st-mcp/sync-domain/github.svg)](https://agentmods.dev/skills/alexismarasigan/db2st-mcp/sync-domain)

Your own site

<a href="https://agentmods.dev/skills/alexismarasigan/db2st-mcp/sync-domain"><img src="https://agentmods.dev/badge/skills/alexismarasigan/db2st-mcp/sync-domain/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/alexismarasigan/db2st-mcp/sync-domain"><img src="https://agentmods.dev/badge/skills/alexismarasigan/db2st-mcp/sync-domain.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 754 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00048	$0.00754
Opus 5.5	$0.00019	$0.00302
Sonnet 5.5	$0.00010	$0.00151
Haiku 4.5	$0.00005	$0.00075

Measured 2mo ago against content hash 9ef64857f3cd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

sync-domain 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 2mo 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.

.claude/skills/sync-domain/SKILL.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

sync-domain

Propose a DOMAIN.md update for a given domain by comparing the current doc to the code in that domain. Output is always a diff proposal — never a direct write.

Executable: scripts/sync_domain.py. Locally: uv run python scripts/sync_domain.py <name> or --all.

When to invoke

After a non-trivial change to src/db2st_mcp/domains/<name>/.
When reviewing a PR that touches a domain but leaves DOMAIN.md unchanged.
Before opening a release PR, run against every domain.

Arguments

/sync-domain <domain>     # e.g. /sync-domain tracking
/sync-domain --all        # iterate over every domains/* subdir

What it does

Resolve the target domain path: src/db2st_mcp/domains/<name>/.
Scan exports:
- Public symbols re-exported from shared/__init__.py and server/__init__.py (and client/__init__.py if present).
- Pydantic models in shared/schemas.py.
- Protocols in shared/protocols.py.
Identify patterns in use:
- Direct imports from other domains (must match a documented dependency).
- Imports from shared/ (always allowed).
Check pyproject.toml / module-level dependencies against the Dependencies on other domains section of DOMAIN.md.
Compare extracted facts to the current DOMAIN.md text:
- New public symbols? → propose adding to the "Public surface" table.
- Removed symbols? → propose removing the row.
- New cross-domain import? → propose adding to "Dependencies on other domains".
- Errors raised by handlers? → propose updating the "Error mapping" table.
Emit a unified diff against DOMAIN.md. Do not write the file.
Print a short rationale per change so the human can accept/reject each block.

Output shape

# sync-domain: tracking

Proposed changes to src/db2st_mcp/domains/tracking/DOMAIN.md:

diff --git a/.../DOMAIN.md b/.../DOMAIN.md
--- a/.../DOMAIN.md
+++ b/.../DOMAIN.md
@@
- | TrackingEvent | shared/schemas.py | Pydantic models. |
+ | TrackingEvent, ShipmentMetadata | shared/schemas.py | Pydantic models. |

Rationale:
- ShipmentMetadata was added in shared/schemas.py:62 but is not in DOMAIN.md.

Read the full file on GitHub · 74 lines

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.

2mo ago First seen · 74 lines · 48 tokens per session scan A 9ef64857f3cd

Subscribe to this mod's changes

sync-domain is a skill published in the GitHub repository AlexisMarasigan/db2st-mcp (1 stars, last pushed 3mo ago), licensed MIT. It adds 48 tokens to every session and 754 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-31.

Writing and docs

sync-domain next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
sync-domainAlexisMarasigan/db2st-mcp	Skill	1	3mo ago	MIT	A	48	Claude Code
imagegenopenai/codex	Skill	134k	today	Apache-2.0	A	113	Codex
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	today	MIT	A	200	Claude Code, Codex
playwright-climicrosoft/playwright	Skill	99k	today	Apache-2.0	A	19	Claude Code
systematic-debuggingobra/superpowers	Skill	314k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	today	MIT	A	95	Claude Code
chat-pet-sprite-creationmicrosoft/vscode	Skill	195k	today	MIT	A	53	Claude Code, Codex

db2st-mcp: Skill for Claude Code