cmajor-external

cmajor-external is a skill for Claude Code, Codex from Generous-Corp/pulp. It costs 36 tokens per session (630 once invoked), scanned A, original, MIT.

Use Pulp's MIT-safe Cmajor support lane via source-owned patches, an external cmaj toolchain, and explicit generated-artifact workflows.

Skill for Claude CodeCodex

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/generous-corp/pulp/cmajor-external
Any agent
npx skills add Generous-Corp/pulp --skill cmajor-external
Clone the repo
git clone --depth 1 https://github.com/Generous-Corp/pulp

Made for: Claude Code, Codex.

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 cmajor-external

README.md
[![agentmods](https://agentmods.dev/badge/skills/generous-corp/pulp/cmajor-external.svg)](https://agentmods.dev/skills/generous-corp/pulp/cmajor-external)
Your own site
<a href="https://agentmods.dev/skills/generous-corp/pulp/cmajor-external"><img src="https://agentmods.dev/badge/skills/generous-corp/pulp/cmajor-external.svg" alt="Measured on agentmods" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 630 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 $0.00036 $0.00630
Opus 5 $0.00018 $0.00315
Sonnet 5 $0.00007 $0.00126
Haiku 4.5 $0.00004 $0.00063

Measured today against content hash f43acc487043, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

cmajor-external 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 today.

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/skills/cmajor-external/SKILL.md · 99 lines

How it starts

The opening of the file, as written. The whole thing — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Cmajor External Toolchain

Use this skill when a task involves Pulp's current Cmajor support lane.

Truthful Position

Pulp supports Cmajor as an external toolchain, not as a vendored runtime.

Supported now:

  • .cmajor / .cmajorpatch source examples
  • patch-structure validation through tools/scripts/cmajor_external.py doctor
  • generated-artifact invocation through a user-provided cmaj
  • docs and workflow guidance for the MIT-safe lane

Not supported by this skill:

  • shipping the Cmajor engine/JIT/runtime in Pulp core
  • claiming a finished Processor adapter for arbitrary Cmajor patches
  • blanket hot-reload claims
  • broad multi-DSL parity claims

Core Files

  • docs/guides/cmajor.md
  • tools/scripts/cmajor_external.py
  • docs/contracts/pulp-dsl-v1.md
  • examples/cmajor-gain/

1. Validate the example or patch layout first

python3 tools/scripts/cmajor_external.py doctor \
  --patch examples/cmajor-gain/CmajorGain.cmajorpatch

Use --require-tool when the next step truly depends on a real cmaj.

2. Keep cmaj external

Preferred resolution order:

  • --cmaj /path/to/cmaj
  • CMAJ_BIN=/path/to/cmaj
  • PATH

Do not turn the upstream Cmajor runtime/toolchain into a bundled dependency of Pulp unless the repo's license policy changes.

3. Generate artifacts explicitly

python3 tools/scripts/cmajor_external.py generate \
  --patch examples/cmajor-gain/CmajorGain.cmajorpatch \
  --target cpp \
  --output /tmp/CmajorGain.cpp

Pass through target-specific args with repeated --arg flags.

4. Keep docs truthful

When editing this lane, keep these in sync:

  • docs/guides/cmajor.md
  • docs/reference/capabilities.md
  • docs/guides/examples.md
  • planning/v3-phase14-gap-closure-status.md

What To Check

For the current Cmajor lane, verify:

  • patch manifest/source layout is valid
  • missing-tool diagnostics are explicit
  • helper commands target the user-supplied cmaj, not an assumed bundled tool
  • docs do not imply a shipped runtime or checked-in generated output

Read the full file on GitHub · 99 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. today First seen · 99 lines · 36 tokens per session scan A f43acc487043

Subscribe to this mod's changes

cmajor-external is a skill published in the GitHub repository Generous-Corp/pulp (16 stars, last pushed today), licensed MIT. It adds 36 tokens to every session and 630 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 2026-09-04.

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