agent-harness-sprint

agent-harness-sprint is a skill for Claude Code, Codex from bouob/agent-harness. It costs 44 tokens per session (879 once invoked), scanned A, original, MIT.

A workflow for running a coding sprint in three stages: planning, implementation, and checking. It can divide separate tasks among different automated workers.

In plain words
What is it for?
Use it for complex changes that need a reviewed plan, parallel work on separate tasks, and a final evaluation.
Why use it?
It reduces the risk of starting implementation from an incomplete plan and adds a checking stage after the work is generated.

Skill for Claude CodeCodex

Written for Claude Code and Codex: argument-hint in frontmatter, but also reads ~/.codex or $CODEX_HOME. Also seen: mentions subagents; mentions Codex.

Part of the agent-harness plugin — 5 skills, 1 command, 1 hook shipped together

Good fit Use it for complex changes that need a reviewed plan, parallel work on separate tasks, and a final evaluation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/bouob/agent-harness/agent-harness-sprint
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.

Any agent
npx skills add bouob/agent-harness --skill agent-harness-sprint
Clone the repo
git clone --depth 1 https://github.com/bouob/agent-harness

Made for: Claude Code, Codex.

Or install agent-harness, the plugin that ships this one along with the rest of its 5 skills, 1 command, 1 hook.

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 agent-harness-sprint

README.md
[![agentmods](https://agentmods.dev/badge/skills/bouob/agent-harness/agent-harness-sprint/github.svg)](https://agentmods.dev/skills/bouob/agent-harness/agent-harness-sprint)
Your own site
<a href="https://agentmods.dev/skills/bouob/agent-harness/agent-harness-sprint"><img src="https://agentmods.dev/badge/skills/bouob/agent-harness/agent-harness-sprint/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for agent-harness-sprint

Your own site · 80×15
<a href="https://agentmods.dev/skills/bouob/agent-harness/agent-harness-sprint"><img src="https://agentmods.dev/badge/skills/bouob/agent-harness/agent-harness-sprint.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 879 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00044 $0.00879
Opus 5 $0.00022 $0.00439
Sonnet 5 $0.00009 $0.00176
Haiku 4.5 $0.00004 $0.00088

Measured 9d ago against content hash 96eef3f95cb8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

agent-harness-sprint 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 9d 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.

codex/skills/agent-harness-sprint/SKILL.md · 118 lines

How it starts

The opening of the file, as written. The whole thing — 118 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Harness Sprint

Run a Codex-oriented Planner -> Generator -> Evaluator sprint. Use this skill for complex work that benefits from planned delegation and a verification gate.

References

  • ../../references/codex-sprint-contract.md - Codex sprint artifact contract and task rules
  • ../../references/codex-config-schema.md - Codex model routing config

Step 1 - Resolve Codex Model Routing

Read Codex config in this order:

  1. ./.codex/agent-harness.local.json
  2. ~/.codex/agent-harness.json
  3. Built-in defaults from ../../references/codex-config-schema.md

Only read .codex config files. Do not read .claude/agent-harness*.json.

Resolve each role independently:

  • planner
  • evaluator
  • generator.code
  • generator.write
  • generator.research
  • generator.collect

Routing rules:

  • mode: "inherit" - omit both model and reasoning_effort when spawning that role
  • mode: "explicit" - pass model; if reasoning_effort is present, pass it too

If the config has an unknown host, version, mode, or malformed explicit route, warn the user and fall back that role to inherit-mode routing for this run.

If Codex rejects a configured model or reasoning override at runtime, warn the user, retry that role with inherit-mode routing, and continue unless the retry also fails.

Step 2 - Planning Gate

If the user provided only a loose spec, first use the planning behavior from agent-harness-sprint-plan.

Continue to execution only when the plan has:

  • Acceptance criteria
  • A task list
  • Ownership boundaries
  • Verification commands or checks
  • Routing notes that state which tasks inherit the current session and which use explicit model or reasoning overrides

Step 3 - Initialize Artifacts

Use .sprint/<YYYYMMDD-HHmmss>/ for local sprint artifacts.

Create:

  • sprint-meta.json
  • sprint-plan.md
  • sprint-progress/

Keep .sprint/ local-only. Do not commit sprint artifacts unless the user explicitly asks.

Step 4 - Execute Generator Tasks

Read the full file on GitHub · 118 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. 9d ago First seen · 118 lines · 44 tokens per session scan A 96eef3f95cb8

Subscribe to this mod's changes

agent-harness-sprint is a skill published in the GitHub repository bouob/agent-harness (5 stars, last pushed 1mo ago), licensed MIT. It adds 44 tokens to every session and 879 once invoked, about $0.0002 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 2026-08-31.

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