fire-map-codebase

A command that uses several mapper agents to examine a codebase and create structured documentation about it.

In plain words
What is it for?
Mapping existing projects, focusing on areas such as authentication, APIs, or databases, and writing the results into .planning/codebase/.
Why use it?
It reduces the effort of understanding an unfamiliar or changed codebase before planning refactoring or other major work.

Command

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 commands/thierryn/fire-flow/fire-map-codebase
Clone the repo
git clone --depth 1 https://github.com/ThierryN/fire-flow
Per session 11 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,999 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 $0.00011 $0.01999
Opus 5 $0.00005 $0.01000
Sonnet 5 $0.00002 $0.00400
Haiku 4.5 $0.00001 $0.00200

Measured 2d ago against content hash 90bd4eb2e959, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

fire-map-codebase 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.

commands/fire-map-codebase.md · 314 lines

How it starts

The opening of the file, as written. The whole thing — 314 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/fire-map-codebase

Analyze existing codebase using parallel agents to produce structured codebase documents


Purpose

Analyze existing codebase using parallel fire-codebase-mapper agents to produce structured codebase documents. Each mapper agent explores a focus area and writes documents directly to .planning/codebase/. The orchestrator only receives confirmations, keeping context usage minimal.

Output: .planning/codebase/ folder with 7 structured documents about the codebase state.


Arguments

arguments:
  focus_area:
    required: false
    type: string
    description: "Optional area to focus mapping on (e.g., 'api', 'auth', 'database')"
    example: "/fire-map-codebase auth"

When to Use

Use /fire-map-codebase for:

  • Brownfield projects before initialization (understand existing code first)
  • Refreshing codebase map after significant changes
  • Onboarding to an unfamiliar codebase
  • Before major refactoring (understand current state)
  • When CONSCIENCE.md references outdated codebase info
  • Before /fire-0-orient when joining existing project

Skip /fire-map-codebase for:

  • Greenfield projects with no code yet (nothing to map)
  • Trivial codebases (<5 files)

Process

Step 1: Check Existing Map

ls .planning/codebase/*.md 2>/dev/null | wc -l

If codebase documents exist:

Use AskUserQuestion:

  • header: "Existing Map"
  • question: "Codebase map already exists. What would you like to do?"
  • options:
    • "Refresh all (Recommended)" - Re-analyze entire codebase
    • "Refresh specific area" - Only update one focus area
    • "Skip" - Keep existing map

Step 2: Create Directory Structure

mkdir -p .planning/codebase

Step 3: Display Spawning Banner

+------------------------------------------------------------------------------+
| FIRE MAP CODEBASE                                                            |
+------------------------------------------------------------------------------+
|                                                                              |
|  Spawning 4 parallel mapper agents...                                        |
|                                                                              |
|    -> Agent 1: Tech focus (STACK.md, INTEGRATIONS.md)                        |
|    -> Agent 2: Architecture focus (ARCHITECTURE.md, STRUCTURE.md)            |
|    -> Agent 3: Quality focus (CONVENTIONS.md, TESTING.md)                    |
|    -> Agent 4: Concerns focus (CONCERNS.md)                                  |
|                                                                              |
|  Focus area: {focus_area or "entire codebase"}                               |
|                                                                              |
+------------------------------------------------------------------------------+

Read the full file on GitHub · 314 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 First seen · 314 lines · 11 tokens per session scan A 90bd4eb2e959

Subscribe to this mod's changes

fire-map-codebase is a command published in the GitHub repository ThierryN/fire-flow (77 stars, last pushed 19d ago), licensed MIT. It adds 11 tokens to every session and 1,999 once invoked, about $0.0001 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.