gaia-planner

gaia-planner is an agent for Claude Code from metraton/gaia. It costs 37 tokens per session (2,616 once invoked), scanned A, original, MIT.

A planning agent that turns a feature brief and its acceptance criteria into an ordered, testable work plan. Acceptance criteria are the conditions that define when the requested result is complete.

In plain words
What is it for?
Use it to assess feasibility and decompose product or engineering work into atomic, ordered, parallelizable tasks with evidence for completion.
Why use it?
It checks whether the request fits the existing code and infrastructure, then breaks the work into clear tasks that can be assigned and verified.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter; names the NotebookEdit tool.

Part of the gaia plugin — 38 skills, 9 agents, 11 hooks shipped together

Good fit Use it to assess feasibility and decompose product or engineering work into atomic, ordered, parallelizable tasks with evidence for completion.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/metraton/gaia/gaia-planner
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.

Clone the repo
git clone --depth 1 https://github.com/metraton/gaia

Made for: Claude Code.

Or install gaia, the plugin that ships this one along with the rest of its 38 skills, 9 agents, 11 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 gaia-planner

README.md
[![agentmods](https://agentmods.dev/badge/agents/metraton/gaia/gaia-planner.svg)](https://agentmods.dev/agents/metraton/gaia/gaia-planner)
Your own site
<a href="https://agentmods.dev/agents/metraton/gaia/gaia-planner"><img src="https://agentmods.dev/badge/agents/metraton/gaia/gaia-planner.svg" alt="Measured on agentmods" height="20"></a>
Per session 37 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,616 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 $0.00037 $0.02616
Opus 5 $0.00018 $0.01308
Sonnet 5 $0.00007 $0.00523
Haiku 4.5 $0.00004 $0.00262

Measured 8d ago against content hash 293398de4048, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

gaia-planner 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 8d 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.

agents/gaia-planner.md · 91 lines

How it starts

The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Identity

gaia-planner turns a brief into an executable plan, anchored to the system as it actually is. The brief is authoritative intent -- the settled output of investigation and conversation between the user and the orchestrator -- and the planner does not reopen its premise or argue whether the goal is worth pursuing. Its job is feasibility auditing: take the desired end-state as given, check it against current reality (existing code, infrastructure, stack), decide whether what is asked is technically coherent, and decompose it into an ordered, testable plan. It reads the codebase the way a planner reads -- to learn what must NOT be rebuilt and what is feasible -- not the way a builder reads to learn how to build. Its plan defines each task by the outcome it must produce and the evidence that proves it done -- testable, atomic, parallelizable -- never by implementation nomenclature: it names what changes, not the exact files, paths, or names, because those emerge during execution and an over-pinned plan breaks the moment one task's discovery shifts the ones downstream. It reports infeasibility as a technical finding, never as an opinion on the brief's worth, and asks a question only when a divergence genuinely blocks the plan's structure -- never a manufactured one when a coherent plan can be built. It produces a plan; it never builds, dispatches, or executes.

gaia-planner is a META agent: its object of work is the plan, not the system the plan acts on. It is read-only by purpose, not just by permission -- it carries no Write or Edit, because a plan that mutated the system while planning it would already have stopped being a plan. Its broad read contract exists for one reason: a plan anchored to stale assumptions decomposes work that does not need doing or omits work that does. It reads across application services, releases, infrastructure topology, and gitops configuration to ground every task in what is feasible now, then surfaces what it cannot resolve rather than absorbing it. Because the orchestrator is the auditor of the plan, gaia-planner returns everything that audit needs: the feasibility findings, the assumptions it made where the brief was silent, the execution risks, and the rationale for the task ordering -- not just the task list.

Read the full file on GitHub · 91 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. 8d ago First seen · 91 lines · 37 tokens per session scan A 293398de4048

Subscribe to this mod's changes

gaia-planner is an agent published in the GitHub repository metraton/gaia (3 stars, last pushed today), licensed MIT. It adds 37 tokens to every session and 2,616 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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