major-feature-workflow

major-feature-workflow is a skill for Claude Code, Codex from SioYooo/RepoGrammar. It costs 34 tokens per session (365 once invoked), scanned A, original, MIT.

A workflow for making large software changes safely and reviewably. It covers new commands, MCP tools, database schemas, public APIs, indexing changes, and other changes that affect users or system structure.

In plain words
What is it for?
For planning and delivering substantial code changes, including updating architecture documents and checking the final result on the main branch.
Why use it?
It breaks major work into a dedicated branch, small commits, documentation updates, verification, review, and a controlled merge.

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/sioyooo/repogrammar/major-feature-workflow
Any agent
npx skills add SioYooo/RepoGrammar --skill major-feature-workflow
Clone the repo
git clone --depth 1 https://github.com/SioYooo/RepoGrammar

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 major-feature-workflow

README.md
[![agentmods](https://agentmods.dev/badge/skills/sioyooo/repogrammar/major-feature-workflow.svg)](https://agentmods.dev/skills/sioyooo/repogrammar/major-feature-workflow)
Your own site
<a href="https://agentmods.dev/skills/sioyooo/repogrammar/major-feature-workflow"><img src="https://agentmods.dev/badge/skills/sioyooo/repogrammar/major-feature-workflow.svg" alt="Measured on agentmods" height="20"></a>
Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 365 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 $0.00034 $0.00365
Opus 5 $0.00017 $0.00182
Sonnet 5 $0.00007 $0.00073
Haiku 4.5 $0.00003 $0.00036

Measured 3d ago against content hash d9ee18d8f2bd, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

major-feature-workflow 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 3d 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/skills/major-feature-workflow/SKILL.md · 64 lines

What it actually says

Purpose

Keep large changes reviewable and mergeable.

Trigger conditions

Use for new CLI commands, MCP tools, database schema changes, language or framework adapters, major indexing changes, public API changes, or cross-subsystem features.

Required reading

  • docs/development/branching-and-commits.md
  • docs/development/agent-workflow.md
  • Relevant ADRs and specifications

Preconditions

  • main is clean or unrelated changes are explicitly protected.
  • The feature has a clear scope and success criteria.

Step-by-step procedure

main
-> create dedicated branch
-> implement atomic commits
-> run full verification
-> update docs and ADRs
-> review diff
-> merge --no-ff into main when checks pass
-> delete the merged branch after main contains it

Required verification

Run all standard checks before merge and again on main after merge. Before deleting the merged branch, verify main contains the work by ancestry, patch-equivalence, PR merge state, or another explicit branch-containment check.

Documentation updates

Update specifications, architecture docs, ADRs, README, CHANGELOG, skills, and memories as appropriate to the feature.

Commit requirements

Use one or more independently coherent Conventional Commits.

Completion report

Report feature branch, commit hashes, merge commit, branch deletion status, verification results, and remaining risks.

Failure and rollback handling

Do not merge a failing branch. Do not force-push or rewrite shared history without explicit maintainer approval.

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. 3d ago First seen · 64 lines · 34 tokens per session scan A d9ee18d8f2bd

Subscribe to this mod's changes

major-feature-workflow is a skill published in the GitHub repository SioYooo/RepoGrammar (0 stars, last pushed 21d ago), licensed MIT. It adds 34 tokens to every session and 365 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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