Martin Loop

MartinLoop

Give coding agents more work. Watch them less. Ship more.

MartinLoop lets you give coding agents real software jobs without babysitting every step.

Your coding agent still writes the code. MartinLoop keeps the job focused, bounded, and accountable — with limits, stop conditions, verification, recovery, and a clear outcome when the run ends.

Start Here

Audit first — run npx -y martin-loop@latest audit to see how much API-equivalent Claude Code spend went into fix-and-retry loops. Add --offline for zero network access or --share for a shareable summary.

Install / onboard — run npx -y martin-loop@latest start, or install it globally with npm install -g martin-loop@latest.

Governed run — define an objective, verifier, budget, and iteration cap with martin run.

Verifier — completion requires fresh verifier evidence bound to the active run and workspace. A configured verifier proves only the checks it runs; VERIFIED is not a claim that the code is bug-free or automatically safe to merge.

Budget — set a hard spend ceiling with --budget-usd and an attempt ceiling with --max-iterations.

Receipts — inspect the latest result with martin dossier --latest and validate stored integrity with martin runs verify --latest.

Hosted sync (optional) — governed work is local-first. Configure MARTIN_API_TOKEN and MARTIN_TELEMETRY_ENDPOINT, then use martin sync status and martin sync flush to send preserved evidence to a dashboard later. See the quickstart.

MCP — install @martinloop/mcp@latest in a supported host or generate host configuration with martin mcp print-config.

Documentation — continue with the quickstart, CLI reference, or MCP setup.

When --model is provided, MartinLoop passes it through unchanged. Without --model, the authenticated host runtime chooses its own default. MartinLoop does not inject a hidden fallback model.

For AI Agents

MartinLoop is the system around the coding job.

The coding agent still writes the code. MartinLoop keeps the job, limits, verification, recovery, outcome, and history consistent around the work.

Use MartinLoop when a coding task needs:

• clear job and success criteria
• preflight readiness before agent spend
• hard budget and iteration limits
• allowed or denied edit scope
• controlled retries and stop conditions
• independent verifier commands
• recovery and rollback evidence
• a finite completion decision
• run receipts, dossiers, history, failure classification, and post-run analysis
• one consistent workflow across supported coding-agent runtimes

Canonical lifecycle:

DEFINE  -> PREFLIGHT  -> CONTROL  -> VERIFY  -> RECOVER  -> PROVE  -> ANALYZE

The product-level flow is Definition of Done -> Controlled Run -> Verified Handoff.

For machine-readable context start with llms.txt, llms-full.txt, and MartinLoop for AI Agents.

One System Around the Run

Teams should not need to stitch together a separate script or point tool for every part of coding-agent execution. MartinLoop connects the control path around the agent from preflight through post-run evidence.

MartinLoop does not replace Git, GitHub, CI, dedicated security scanners, observability platforms, code review, or the coding agent itself. It gives those workflows one governed execution record to inspect.

Change the worker. Keep the job.

MartinLoop is model-agnostic by design. The job, limits, verification, recovery, and outcome are separate from the worker underneath.

Native coding-agent CLIs and OpenAI-compatible model runtimes use different execution paths, so MartinLoop only describes a worker as fully supported when that execution path has been publicly released and validated.

Why MartinLoop

AI coding agents can create more software than ever. The problem is trusting them with bigger jobs without turning yourself into their full-time manager.

Agents drift. They retry. They break unrelated things. They say "done" too early. And a run that was supposed to save time can create even more work to review.

MartinLoop keeps the job accountable outside the agent itself: clear boundaries, hard limits, configured checks, recovery information, and an explicit outcome.

The goal is simple:

Give the agent more responsibility without giving it unlimited freedom.

Why Teams Adopt MartinLoop

• Less babysitting — give agents larger jobs without watching every step.
• Clear boundaries — keep scope, attempts, and spend inside the limits you set.
• Checks before "done" — configured verification decides whether the evidence passed.
• Understand failures — know why the run stopped instead of digging through logs.
• Recover cleanly — preserve enough evidence to retry, repair, roll back, or hand off.
• One workflow across agents — keep the job consistent as the worker underneath changes.

More software. Less supervision.

See Your Loop Tax

Before changing your workflow, measure it:

npx -y [email protected] audit

MartinLoop reads Claude Code session history locally and reports how much API-equivalent agent spend happened inside fix-and-retry loops, how often verifier commands failed, the longest retry chain, and sessions that ended red. Session contents stay local. Use --offline to disable even the public pricing lookup, and --share to create a screenshot-ready SVG plus Markdown summary.

Then put limits around the next run:

npx -y [email protected] enable --engine codexnpx -y [email protected] run "<task>" --verify "npm test" --budget-usd 2 --max-iterations 3

2-Minute Install Path

If MartinLoop detects more than one supported coding-agent runtime, save the one you want to use before the first governed run. For example:

npx -y martin-loop@latest enable --engine codex

Replace codex with claude or gemini when that is your intended runtime.

npx -y martin-loop@latest startnpx -y martin-loop@latest democd martin-loop-demonpm installnpx -y martin-loop@latest run "Summarize the demo workspace and prove tests still pass" --verify "npm test" --budget-usd 2 --max-iterations 1

Quick Start

Try MartinLoop in a disposable demo workspace:

npx -y martin-loop@latest enable --engine codexnpx -y martin-loop@latest startnpx -y martin-loop@latest demonpx -y martin-loop@latest --versioncd martin-loop-demonpm installnpx -y martin-loop@latest run "Summarize the demo workspace and prove tests still pass" --verify "npm test" --budget-usd 2 --max-iterations 1npx -y martin-loop@latest dossier --latestnpx -y martin-loop@latest share --latest

Optional global install:

npm install -g martin-loopmartin-loop --version

If this flow is useful, open an issue with feedback so we can keep improving the public experience.

start prints the first-run guided path. run auto-checks doctor, session-start, and preflight, then executes when the environment is ready. Use --proof only when you intentionally want an explicit no-spend lane.

Inspect-first flow:

npx -y martin-loop@latest enable --engine codexnpx -y martin-loop@latest doctornpx -y martin-loop@latest session-startnpx -y martin-loop@latest preflight "Summarize the demo workspace and prove tests still pass" --verify "npm test"

share --latest writes three files into the selected run directory under share/: run-receipt.json, run-receipt.md, and proof-card.svg.

Release notes for MartinLoop 0.6.5: MartinLoop 0.6.5.

Release notes for MartinLoop 0.6.6: MartinLoop 0.6.6.

Release notes for MartinLoop 0.6.7: MartinLoop 0.6.7.

Release notes for MartinLoop 0.6.8: MartinLoop 0.6.8.

Release notes for MartinLoop 0.7.0: MartinLoop 0.7.0.

Release notes for MartinLoop 0.7.1: MartinLoop 0.7.1.

Release notes for MartinLoop 0.8.0: MartinLoop 0.8.0.

Release notes for MartinLoop 0.8.1: MartinLoop 0.8.1.

Release notes for MartinLoop 0.8.2: MartinLoop 0.8.2.

Release notes for MartinLoop 0.8.3: MartinLoop 0.8.3.

Release notes for MartinLoop 0.8.4: MartinLoop 0.8.4.

Release notes for MartinLoop 0.8.5: MartinLoop 0.8.5.

Release notes for MartinLoop 0.8.6: MartinLoop 0.8.6.

Release notes for MartinLoop 0.8.7: MartinLoop 0.8.7.

Release notes for MartinLoop 0.8.8: MartinLoop 0.8.8.

Release notes for MartinLoop 0.8.9: MartinLoop 0.8.9.

Release notes for MartinLoop 0.9.0: MartinLoop 0.9.0.

Swarm Mode Demo

Run the deterministic 15-agent launch-board demo without provider calls or spend:

npx -y [email protected] demo --swarm

That default result is local simulation evidence only: it is non-governed, is not persisted to the Swarm run store, and does not evaluate signed receipt integrity. Inspect simulation output through the demo --swarm human view or demo --swarm --json, plus the local files created under --dir. Do not use swarm status, swarm inspect, swarm dossier, swarm verify, or swarm share for the default simulation output.

To exercise the persisted provider-free governance path, use:

npx -y [email protected] demo --swarm --governed --agents 15 --max-concurrency 5 --budget-usd 0

An approved live Codex qualification uses the same persisted route with --live, an explicit positive budget, and a clean repository baseline. Persisted modes use --cwd and --runs-dir; they reject the simulation-only --dir and --force flags. Live failures exit nonzero and never fall back to simulation.

Persisted demo runs and runs created by swarm plan plus swarm run are valid inputs to swarm status, swarm inspect, swarm dossier, swarm verify, and swarm share. A stored run is not automatically verified: rely on the verifier and receipt-integrity result, not the command route alone.

Model and Engine Support

MartinLoop governs the job independently of the coding worker.

• Native agent CLIs: Codex, Claude Code, Gemini CLI
• OpenAI-compatible endpoints: Kimi K2, NVIDIA Nemotron, DeepSeek, Qwen/Qwen Coder, Mistral/Codestral, OpenRouter/Together/Fireworks routes, Ollama, LM Studio, llama.cpp, and other compatible endpoints
• Use --engine openai for OpenAI-compatible model endpoints.

The worker changes; MartinLoop's budget, scope, verifier, receipt, and integrity contract does not.

More detail: Model and engine support

The Run From Start to Handoff

MartinLoop's terminal presentation is built around the governed lifecycle, not around a single verifier command.

Governed Run Plan shows the configured finish line before work starts, including the task, budget posture, verifier plan, scope, and execution boundaries.

Controlled Run keeps the coding agent working inside those boundaries while MartinLoop tracks attempts, cost, stop conditions, and recovery state.

Verified Handoff closes the loop with one authoritative outcome:

• VERIFIED when the configured evidence supports the Definition of Done
• STOPPED when a configured hard boundary ends the run
• NEEDS REVIEW when completion cannot be established from the available evidence

The handoff can include verifier steps, scope state, attempt count, cost provenance, unresolved evidence, recovery state, receipt integrity, and the next safe action. The exact fields depend on what the run actually established.

Visual Proof

MartinLoop turns an AI coding run into an inspectable execution record: budget used, verifier result, changed files, rollback evidence, and final receipt.

Ungoverned agents can retry until cost and scope drift. MartinLoop adds budget caps, verifier gates, and audit evidence so the run has a clear stop condition.

MartinLoop Arcade

Long governed runs do not have to mean staring at a spinner. In an interactive terminal, MartinLoop Arcade can be offered while the coding agent continues working in the background.

Arcade is presentation-only. It cannot change the agent, budget, verifier, policy decision, run outcome, or receipt evidence. It stays out of JSON, CI, non-interactive, and other machine-readable execution paths.

Use --arcade to offer Arcade immediately for a supported interactive run, or --no-arcade to suppress it for that run.

Proof Receipts

Proof receipts are local share bundles for governed AI coding runs. They show the task, spend, budget, verifier result, receipt integrity, and any evidence boundary that should not be rounded into confidence.

This real governed run spent $0.51 against a $3.00 budget. The verifier passed and the receipt integrity was signed, but the proof stayed at EVIDENCE_BOUNDARY because rollback evidence was not recorded.

Generate your own receipt after a governed run:

npx -y martin-loop@latest run "Summarize the demo workspace and prove tests still pass" --proof --verify "npm test"npx -y martin-loop@latest runs verify --latestnpx -y martin-loop@latest share --latest

Example receipt files: Markdown and JSON.

Verify the Public Release Yourself

Use this lane from a clean temp directory to verify the public CLI flow exactly as shipped:

npx -y [email protected] enable --engine codexnpx -y [email protected] --versionnpx -y [email protected] startnpx -y [email protected] democd martin-loop-demonpm installnpx -y [email protected] run "Summarize the demo workspace and prove tests still pass" --verify "npm test" --budget-usd 2 --max-iterations 1 --jsonnpx -y [email protected] dossier --latest --jsonnpx -y [email protected] share --latest --json

For deterministic installs, pin the package line ([email protected]) or use martin-loop@latest. Plain npx martin-loop can resolve a stale local cache on some machines.

Expected share bundle outputs:

• share/run-receipt.json
• share/run-receipt.md
• share/proof-card.svg

See It In Action

The point is not that every governed run is always cheaper. The point is that every run becomes inspectable and enforceable: budget policy, verifier result, stop reason, and evidence are explicit.

For a deterministic public repro lane, use the benchmark workspace and compare governed execution to unbounded retry behavior:

• npx martin-loop bench --suite under-3-challenge
• npx martin-loop bench --suite ralphy-engineering-50

Ralph-Style Loops

A Ralph-style loop is the failure mode where an AI coding agent keeps trying without knowing when continuing is unsafe, uneconomical, or unlikely to succeed.

MartinLoop keeps the useful part of the loop, then adds brakes:

• stop before budget overspend
• classify unsafe or invalid actions before execution
• write an audit record for every attempt
• preserve rollback and verifier evidence for review
• reduce runaway context growth with compact run summaries

Failure Taxonomy (13 Runtime Classes)

When a coding agent fails, "something went wrong" is not useful enough.

MartinLoop classifies runtime failures into 13 canonical classes so a failed run can tell you what happened, what needs attention, and what future runs can learn from.

See the canonical table: Failure Taxonomy (13 Runtime Classes).

What It Does

• Budget caps stop the next attempt before a configured USD, token, or iteration limit is exceeded.
• Verifier gates require a real check, such as npm test, before a run can count as complete.
• Policy checks block unsafe verifier commands, risky path changes, and secret-like task inputs before execution.
• Failure classification uses canonical runtime classes for triage and reporting. See Failure Taxonomy (13 Runtime Classes).
• Run receipts capture stop reason, verifier evidence, budget posture, integrity state, and the next safe action.
• martin share --latest turns the latest governed run into a local share bundle with a redacted JSON receipt, Markdown recap, and proof-card SVG.
• MCP integration gives hosts one write-capable execution entrypoint plus richer planning, inspection, and review helpers.

How It Works

Trust Boundaries

• Cost and token outputs always include provenance (actual, calculated, estimated, or unavailable).
• For Codex specifically, MartinLoop reports authoritative usage only when the host exposes it; otherwise MartinLoop labels usage as estimated and avoids presenting it as settled accounting.
• Receipt integrity must be verified before a run is treated as trustworthy evidence for external review.

CLI

martin-loop doctormartin-loop demomartin-loop session-start [--host <claude|codex|gemini|generic>]martin-loop phase status|contract|session-start|preflight|run [--execute]martin-loop preflight <objective> [options]martin-loop run <objective> [options]martin-loop bench --suite <suiteId>martin-loop triagemartin-loop dossier (--latest | --loop-id <id> | --file <path>)martin-loop runs list|get|attempt|verify ...martin-loop mcp print-config --host <codex|claude|gemini|cursor|vscode|generic>martin-loop mcp install --host <codex|claude|gemini|cursor|vscode|generic>martin-loop mcp verify-install --host <name> [--scope <user|project|local>]martin-loop mcp rollback --host <name> [--scope <user|project|local>]martin-loop mcp uninstall --host <name> [--scope <user|project|local>]martin-loop challenge [--loop-id <id> | --file <path> | --latest]martin-loop share (--loop-id <id> | --file <path> | --latest) [--out-dir <path>]martin-loop badge [--format svg|json] [--runs-dir <path>]

[Install in VS Code] [Add to Cursor]

Common options:

--budget <n>            Hard cost cap in USD--budget-usd <n>        Alias for --budget--soft-limit-usd <n>    Soft budget threshold in USD--verify <cmd>          Verifier command after each attempt--proof                 Run verifier-only evidence checks without claiming governed execution--max-iterations <n>    Maximum number of attempts--max-tokens <n>        Maximum token budget--engine <name>         Adapter to use: claude, codex, gemini, or openai--cwd <path>            Repo root for the run--allow-path <glob>     Restrict writes to this path pattern; repeatable--deny-path <glob>      Block this path pattern; repeatable--runs-dir <path>       Override the local Martin runs root

Examples below use npx martin-loop so they work without a global install. If you install martin-loop globally, the martin alias works too.

Use martin-loop share --latest after dossier when you want a redacted bundle you can hand to another person without sending raw run-store files.

More detail: CLI reference and configuration reference.

Benchmarks

MartinLoop ships a public deterministic benchmark workspace in benchmarks/ plus the installed-package bench command.

From an installed package:

npx martin-loop bench --suite under-3-challengenpx martin-loop bench --suite ralphy-engineering-50

From a clean public clone:

pnpm install --frozen-lockfilepnpm bench:buildpnpm bench:evalpnpm bench:report:ralphy

Equivalent workspace-filter commands:

pnpm --filter @martin/benchmarks buildpnpm --filter @martin/benchmarks testpnpm --filter @martin/benchmarks evalpnpm --filter @martin/benchmarks report:ralphy

The installed-package command reads the shipped public fixtures. The repo-clone workflow runs the public benchmark workspace directly.

MCP

Run the standalone MCP package directly:

npx -y @martinloop/mcp

Add it to common hosts:

codex mcp add martin-loop -- npx -y @martinloop/mcpclaude mcp add --transport stdio --scope user martin-loop -- npx -y @martinloop/mcpclaude mcp add --transport stdio --scope user martin-loop -- cmd /c npx -y @martinloop/mcp

Generate host config from the root CLI:

npx martin-loop mcp print-config --host codex --transport stdio --profile minimalnpx martin-loop mcp print-config --host claude --transport stdio --profile diagnosticnpx martin-loop mcp print-config --host gemini --transport stdio --profile full-localnpx martin-loop mcp print-config --host generic --transport stdio --profile github-review

The root martin-loop package, standalone @martinloop/mcp package, plugin metadata, and MCPB product version are aligned at 0.9.0. The MCPB manifest schema remains 0.3.

The public MCP release train labels are:

• 0.1.4 operator foundation
• 0.2.0 cockpit expansion
• 0.2.5 public MCP package line
• 0.2.7 usability and review release
• 0.3.0 host adoption and onboarding release
• 0.3.1 review and handoff release
• 0.5.3 execution-control and host-compatibility release
• 0.5.5 governed-autonomous execution and proof-surface release
• 0.5.6 hosted run sync, fail-closed rollback, and verified-completion hardening

The standalone MCP registry/server identifier is io.github.Keesan12/martin-loop.

More detail: MCP setup, MCP tool reference, and MCP compatibility.

SDK

npm install martin-loop

import { MartinLoop, createClaudeCliAdapter } from "martin-loop";
const loop = new MartinLoop({  adapter: createClaudeCliAdapter({ workingDirectory: process.cwd() }),  defaults: {    workspaceId: "my-workspace",    projectId: "my-project",    budget: {      maxUsd: 3,      softLimitUsd: 2.25,      maxIterations: 3,      maxTokens: 20_000,    },  },});
const result = await loop.run({  task: {    title: "Fix auth regression",    objective: "Fix the failing auth regression tests",    verificationPlan: ["pnpm test"],    repoRoot: process.cwd(),  },});
console.log(result.decision.status);

The root SDK also exports createCodexCliAdapter, createGeminiCliAdapter, createDirectProviderAdapter, and createOpenAiCompatibleAdapter.

More detail: SDK reference and package map.

Examples

• Quickstart
• Examples
• MartinLoop for AI Agents
• Agent Failure Atlas
• Failure Taxonomy (13 Runtime Classes)
• PRE-028-PUBLIC-SURFACE-DIFF.md
• Claude Code walkthrough
• Codex setup
• MCP setup
• MCP tool reference
• Agent run receipts
• Benchmark + receipt page
• GitHub Actions budget gate
• OpenCode-style adapter

Development

Requirements:

• Node.js 20+
• pnpm 10.x

git clone https://github.com/Keesan12/martin-loop.gitcd martin-looppnpm install --frozen-lockfilepnpm lintpnpm testpnpm buildpnpm public:copy-scanpnpm public:git-surfacepnpm oss:validatepnpm public:smokepnpm release:matrix:local

Standalone MCP validation:

pnpm --filter @martinloop/mcp lintpnpm --filter @martinloop/mcp testpnpm --filter @martinloop/mcp buildpnpm --filter @martinloop/mcp smoke:packpnpm --filter @martinloop/mcp smoke:published:packpnpm --filter @martinloop/mcp verify:release

Contributing

Issues, bug reports, workflow feedback, and focused pull requests are welcome. Public-facing docs should stay concise, user-centered, and accurate.

git checkout -b feat/your-featurepnpm lintpnpm testgit commit -m "feat: describe what you built"git push -u origin feat/your-feature

Star this repo if you want to give coding agents more real work without babysitting every step.

martinloop.com · [email protected]

MartinLoop is part of the NVIDIA Inception program.

[NVIDIA Inception Program logo]

Telemetry & Privacy

MartinLoop sends minimal anonymous usage data to help improve reliability and prioritize development. On a fresh interactive install, telemetry is enabled by default but remains blocked until the one-time disclosure is shown. After the disclosure, the same run may send the allowlisted anonymous events unless you opt out.

What is sent:

• Random installation ID (generated locally, never linked to your identity)
• Per-process session ID
• CLI version, Node version, OS and architecture
• Event name and timestamp
• Command category, run duration, success/failure category
• Whether a receipt was generated; whether recovery occurred
• Opaque remote-experience ID/type after a click

What is never sent:

• Source code, prompts, task text, repository contents, file names, file paths
• Environment variables, secrets, provider/model output
• Receipt contents, ledger contents, approval details, verifier evidence
• Email addresses, workspace, project, or organization identifiers
• Raw exception messages or stack traces

Endpoint: https://tupopqvqnyyjuxseyxkr.supabase.co/functions/v1/product-events

Headers sent: Content-Type: application/json, User-Agent: MartinLoop-CLI/<version>

No authorization header, API key, or direct table access.

Opt out anytime:

martin telemetry off

Inspect what is sent:

martin telemetry explain

Environment variables that disable telemetry: MARTIN_TELEMETRY_DISABLED=1, DO_NOT_TRACK=1, CI=1

Set MARTIN_TELEMETRY_DEBUG=1 to print the telemetry envelope to stderr without transmitting it.

MartinLoop continues to work normally with telemetry disabled. No features are gated on telemetry consent.

License

Apache-2.0. See LICENSE.