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Agent Harnesses

Four installable coordination systems for coding agents. Choose the smallest boundary that matches the work, then install from the verified v0.2.0 release.

Choose by coordination boundary

Every package is complete on its own. The options are alternatives by fit, not steps in a maturity ladder.

Selected harness: Project Harness

project-harness

Project Harness

Low

A small project-local lifecycle for durable context and the next action.

Scenario

“I need one project to remember context between work sessions.”

Best for
One explicit project that needs checkpoints, closeout, and reliable resumption.
Not for
Coordination across workspace children or independent project roots.
What it changes
Creates a bounded project state directory and managed context blocks inside the selected project.

Installation prompt

View full prompt
Install Project Harness (`project-harness`) v0.2.0 from https://github.com/fabianomag/agent-harnesses/releases/download/v0.2.0/project-harness-0.2.0.zip. Before any write, confirm the explicit target and resolve exactly one Python 3.10+ executable available to the user or system as `<python>` (for example `python3`, `python`, or `py -3`); reuse only that executable and never use a private Codex runtime. Download the ZIP and its adjacent `.sha256` sidecar into an isolated temporary directory, verify the checksum before extraction or execution, then extract it. From the extracted bundle root run:
`<python> -B installer.py doctor project-harness --target "<target>" --json`
Stop without writes on a mismatch and only recommend a better fit; never silently substitute another harness. Then run:
`<python> -B installer.py install project-harness --target "<target>" --dry-run --json`
`<python> -B installer.py install project-harness --target "<target>" --apply --json`
Follow `package/README.md` inside the extracted bundle to initialize the target, then run from the bundle root:
`<python> -B installer.py verify project-harness --target "<target>" --json`
Report success only when this final result contains `ready=true`. Clean up temporary files and report the receipt plus `uninstall`/rollback instructions. Do not edit unrelated documentation, `PATH`, or `.gitignore`, and do not install a global Skill.