codexa-plan

A command that saves a snapshot of a planned code change before files are edited. The snapshot records intended files, tests, verification instructions, and the files' current state.

In plain words
What is it for?
It is used before editing files as part of a planned change, especially when later impact or post-edit review will be checked.
Why use it?
It gives later reviews a baseline for spotting changes that drifted from the original plan and for judging whether test evidence is current.

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/mirnoorata/codexa/codexa-plan
Clone the repo
git clone --depth 1 https://github.com/mirnoorata/codexa
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 173 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 $0.00173
Opus 5 $0.00005 $0.00086
Sonnet 5 $0.00002 $0.00035
Haiku 4.5 $0.00001 $0.00017

Measured 2d ago against content hash 5d439dee1991, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

codexa-plan 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.

integrations/claude-code/commands/codexa-plan.md · 21 lines

What it actually says

Save a Codexa change-plan snapshot so the post-edit review can compute drift afterward. Quote the task so it is parsed as a single argument, then list the files you intend to edit. The saved snapshot includes planned-test provenance, verification recipes, freshness, and dirty-file hashes so the later review can distinguish trusted coverage from degraded legacy or stale evidence.

Examples:

/codexa-plan "fix auth bug" src/auth.py
/codexa-plan "redesign frame header" web/src/App.tsx web/src/styles.css

!bash "${CLAUDE_PLUGIN_ROOT}/scripts/cmd/plan.sh" "$ARGUMENTS"

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 · 21 lines · 11 tokens per session scan A 5d439dee1991

Subscribe to this mod's changes

codexa-plan is a command published in the GitHub repository mirnoorata/codexa (2 stars, last pushed 29d ago), licensed MIT. It adds 11 tokens to every session and 173 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 2026-08-31.