STUB — wraps the BookKeeper CLI when installed. Full integration is a v0.2.0 deliverable.
Audit compliance artifacts for staleness and unsigned HITL approvals.
Run a drift check or initialize the baseline.
Scaffold MEK into the current project — drops mek.toml + compliance/ templates.
STUB — wraps the CosmicTasha API when running. Full integration is a v0.2.0 deliverable.
Use the Task tool to delegate compliance review of a planned action. Returns the matched risky-op category, applicable templates, and a draft DECISION_LOG entry.
Use the Task tool to run a deep drift audit. Returns a markdown report of dimensions, current scores, divergences, and suggested resolution per divergence.
Use the Task tool to delegate money/Decimal math review. Hands back a list of float-arithmetic issues and a refactored snippet using lib/decimal_math helpers.
Use when the agent is about to perform a risky operation (destructive shell, deploy, schema migration, money write, force-push). Reminds to record HITL approval and points at compliance/ templates.
Use after PR-sized work completes (or on /mek-drift) to compare auto scores against .mek/drift-baseline.json and surface divergences > 0.15.
STUB. Future v0.2.0 feature — a mini-SQLite ledger so the agent can record/query journal entries for any context (token spend, invoicing, etc.). Not active in v0.1.0.
Use when the agent encounters money-shaped identifiers (amount, price, balance, total, cost), performs arithmetic across monetary fields, or writes/reads money to a database. Enforces Decimal-only math.
Use when starting any conversation in a project where MEK is installed - announces the three guardrails (compliance, drift, ledger) and how to invoke them.
Executes bash commands
Hook triggers when Bash tool is used
Modifies files
Hook triggers on file write and edit operations
Uses power tools
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Uses Bash, Write, or Edit tools
Uses Bash, Write, or Edit tools
Three guardrails for Claude Code: compliance, drift, ledger.
MEK is a Claude Code plugin that ships ambient guardrails for agent work — distilled from three full apps (CosmicTasha, ScoreRift, BookKeeper).
Agents fail in patterns:
float for money and silently round.MEK ships one ambient skill per failure mode, plus matching subagents you can delegate to via Task, plus opt-in hard-gate hooks.
From GitHub (once the repo is public):
/plugin marketplace add mbachaud/MaxExpressKit
/plugin install maxexpresskit@mek-marketplace
From a local checkout (for development):
/plugin marketplace add /absolute/path/to/MaxExpressKit
/plugin install maxexpresskit@mek-marketplace
/mek-init
Drops mek.toml + compliance/ templates into the current directory. Then:
/mek-drift init # seed the drift baseline
/mek-status # see what's active
| Guardrail | When it fires | What it does |
|---|---|---|
| compliance | Before rm -rf, deploy, schema migration, money write, force-push | Nudges to record HITL approval; can hard-block via config. |
| drift | After PR-sized work (Stop hook) or /mek-drift | Compares auto scores (tests, lint, coverage) against your manual baseline. |
| ledger | When the agent touches amount_*, price_*, balance_* identifiers | Enforces Decimal-only math; warns on float-money assignments. |
Skills nudge; hooks WARN. To escalate to hard blocks on specific ops, edit mek.toml:
[compliance.gates]
rm_rf = "block" # require HITL before any rm -rf
force_push_main = "block"
/mek-books, /mek-soc2 light up when CosmicTasha / ScoreRift / BookKeeper are installed. v0.1.0 ships stubs; v0.2.0 ships full pass-through./mek-init lays down your project-level config.Apache 2.0 — see LICENSE.
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