orbit

orbit is a skill for Claude Code from epicsagas/epic-harness. It costs 52 tokens per session (2,805 once invoked), scanned A, original, Apache-2.0.

A command that runs an autonomous software workflow from an approved specification through building, review, evaluation, release, and later improvement.

In plain words
What is it for?
Use it to take a feature from specification to pull request, with planning, implementation, audits, evaluations, and phase recovery.
Why use it?
It keeps the work moving across multiple development phases and can recover its place after a crash using saved pipeline state.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions subagents; mentions AGENTS.md.

Part of the epic plugin — 28 skills, 6 hooks shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/epicsagas/epic-harness/orbit
Any agent
npx skills add epicsagas/epic-harness --skill orbit
Clone the repo
git clone --depth 1 https://github.com/epicsagas/epic-harness

Made for: Claude Code.

Or install epic, the plugin that ships this one along with the rest of its 28 skills, 6 hooks.

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.

agentmods badge for orbit

README.md
[![agentmods](https://agentmods.dev/badge/skills/epicsagas/epic-harness/orbit.svg)](https://agentmods.dev/skills/epicsagas/epic-harness/orbit)
Your own site
<a href="https://agentmods.dev/skills/epicsagas/epic-harness/orbit"><img src="https://agentmods.dev/badge/skills/epicsagas/epic-harness/orbit.svg" alt="Measured on agentmods" height="20"></a>
Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,805 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00052 $0.02805
Opus 5 $0.00026 $0.01403
Sonnet 5 $0.00010 $0.00561
Haiku 4.5 $0.00005 $0.00281

Measured 2d ago against content hash e797a3fbfd06, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

orbit 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 2d 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.

skills/orbit/SKILL.md · 246 lines

How it starts

The opening of the file, as written. The whole thing — 246 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/orbit — Complete Orbit

CRITICAL: Run HARNESS_DIR=$(epic path) first. NEVER use .harness/ in the project directory.

You are entering Orbit mode — the full autonomous pipeline from spec to PR in one shot.

Phase Recovery Protocol

At the start of every response during an active orbit:

  1. Run ls $HARNESS_DIR/orbit/PIPELINE-*.json 2>/dev/null
  2. Find the file with "status": "running"
  3. Read it. Verify phase matches where you left off
  4. If phase is ahead of where you think you are, trust the file — you may have compacted
  5. Conflict resolution (crash-mid-update): If phase_history contains an entry for the current phase with a completed timestamp, treat that phase as done and advance to the next phase — phase_history wins over the phase field when they disagree.
  6. Resume from the resolved phase. Do NOT re-ask mode selection, re-run spec, or re-discover
  7. Worktree recovery: If worktree_name is set in pipeline state:
    • Check if worktree still exists: git worktree list | grep "{worktree_name}"
    • If exists: cd into the worktree path to continue work
    • If not found: worktree was cleaned up externally — abort orbit with warning, set "status": "aborted"

If no file with "status": "running" exists, orbit was not started or has completed. Do not invent one.

Crash recovery: If updated_at is older than 45 minutes and the pipeline is in status: running, assume a crash occurred. Read the state, determine the last completed phase from phase_history (rule 5 above applies), and resume from there. Report the recovery to the user.

Step 0: Preflight

Concurrent-orbit guard — before starting, run:

epic orbit lock   # exit 1 + "another orbit is running" if one is active → STOP

On success you own the guard; run epic orbit unlock when the pipeline reaches a terminal state (complete/aborted). If a crashed orbit left the lock behind, lock reclaims it automatically once no PIPELINE-*.json is running.

Read the full file on GitHub · 246 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.

  1. 2d ago Changed · +10 lines e797a3fbfd06
  2. 6d ago First seen · 236 lines · 52 tokens per session scan A 42abbdcf79ab

Subscribe to this mod's changes

orbit is a skill published in the GitHub repository epicsagas/epic-harness (18 stars, last pushed yesterday), licensed Apache-2.0. It adds 52 tokens to every session and 2,805 once invoked, about $0.0003 per session on Opus 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 2026-08-30.