Harny

Harny

Explain Harny as a local-first workflow runtime, then route the user to the narrowest skill or command that solves the job.

Mental model

Harny loads a declarative YAML DAG, validates it before provider or workspace effects, and executes one ready node at a time. A run can mix Claude and Codex. The default feature-dev workflow plans work, executes tasks sequentially, validates each exact ChangeSet, commits through a privileged executor, and performs a final accumulated validation.

The key invariant is:

implemented diff = validated diff = committed diff

Agents do not publish pull requests or commit directly. Harny owns those privileged effects.

Route requests

Do not invoke another skill automatically unless the user asks.

Install and verify

bun install -g @lfnovo/harny
# or: npm install -g @lfnovo/harny
harny --version
gh auth status # only needed for PR delivery

Harny requires Bun 1.3+, Git, and at least one commit in the target repository.

Choose a workflow

• feature-dev: create a validated local branch. This is the default.
• feature-pr: create or update a draft GitHub PR after validated commits.
• harny pr fix <number>: address feedback on an existing PR from its pinned remote head.
• Project/global YAML: select with --workflow <name-or-path>.

Examples:

harny --name json-export "add JSON export to the CLI"
harny --workflow feature-pr --name json-export "add JSON export to the CLI"
harny --workflow ./.harny/workflows/verify.yaml --name verify "run verification"
harny pr fix 123

Named workflow variants use --workflow id:variant. There is no separate --variant flag.

State and inspection

Run evidence lives under <repo>/.harny/<slug>/:

• run.json: authoritative v4 snapshot with inputs, workspace, scheduler nodes, attempts, ChangeSets and pending human input.
• events.jsonl: append-only audit events.
• transcripts/: normalized provider events per node attempt.

Inspect without parsing schemas manually when possible:

harny ls
harny show <run-id-or-slug>
harny show <run-id> --tail --since 5m
harny ui

The viewer and show expose attempts, normalized transcripts and provider-reported usage. Harny never invents unreported cost.

Providers

Built-in logical IDs are claude and codex. Configure additional connections only in ~/.harny/providers.json; never place secrets in that file or in workflow YAML. base_url, provider type, key environment-variable name and model participate in the persisted connection fingerprint.

Claude supports structured output, resume, Harny tool guards and interactive questions. Codex supports structured output and resume, but does not claim Harny's path-aware tool guards or interactive questions. Unsupported workflow capabilities fail before execution.

Harny prevents project application .env* files from silently selecting Anthropic credentials, then loads optional ~/.harny/.env and ./harny.env. Do not recommend clearing ANTHROPIC_API_KEY manually. Use HARNY_INHERIT_ENV=1 only when the user explicitly wants legacy environment inheritance.

Human review

Use --mode async for persistent parking. There is no daemon.

harny --mode async --workflow ./approval.yaml --name approval "prepare the change"
harny show approval
harny answer approval "approve"
harny answer approval --json '{"approved":true}'

Paused worktrees remain reserved. Discovery and answer commands materialize logical expiry; a configured fallback resumes, otherwise the run fails.

Repository customization

Precedence is project > user-global > bundled:

<repo>/.harny/workflows  > ~/.harny/workflows  > bundled workflows
<repo>/.harny/commands   > ~/.harny/commands   > bundled commands

Prompt overrides live at .harny/prompts/<workflow>/<variant>/<actor>.md. Because generated .harny/* is normally ignored, explicitly retain versioned workflows, commands or prompts in .harny/.gitignore.

Do not synthesize advanced workflow YAML from memory. For a mixed-provider draft PR with persistent approval, read workflow-recipes.md and start from its validated feature-pr-approval.yaml. If no supplied recipe matches, consult the installed workflow schema and validate a project workflow before recommending that it be run.

Cleanup

Terminal run evidence is not removed automatically.

harny clean <slug>
harny clean <slug> --force       # permit SIGTERM for a live run
harny clean <slug> --force --kill
harny clean --prune
harny scan /path/to/repository

Cleaning removes the local run directory, transcripts, worktree, local harny/<slug> branch and matching pointers. It does not remove remote branches or PRs. Review valuable evidence before cleaning.

First adoption

1. Run /harny:check-repo.
2. Confirm clean install and deterministic validator commands on the base branch.
3. Add concise AGENTS.md guidance; keep CLAUDE.md as @AGENTS.md when Claude compatibility is wanted.
4. Start with one small, observable task.
5. Review the diff and run evidence before merging.
6. Use /harny:review for retries, failures, slow runs or novel behavior.

Boundaries

• Do not dispatch from this routing skill; use the orchestrator agent.
• Do not merge, clean, or answer human questions without explicit user intent.
• Do not claim old state.json/plan.json compatibility. Harny 0.5 accepts run schema v4 and workflow schema v2 only.