cvg-build-loop

cvg-build-loop is a skill for Claude Code from gomilesf/convergo. It costs 49 tokens per session (2,388 once invoked), scanned A, original, MIT.

A supervised implementation loop in which a worker builds from a plan and new code reviewers check the result.

In plain words
What is it for?
It is for running monitored build work across Codex or Claude Code sessions, collecting review feedback, and requiring a fresh reviewer before completion.
Why use it?
It adds repeated review and handoff checks to catch problems before the implementation loop ends.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: mentions Claude Code; mentions Codex.

Part of the convergo plugin — 11 skills shipped together

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/gomilesf/convergo/cvg-build-loop
Any agent
npx skills add gomilesf/convergo --skill cvg-build-loop
Clone the repo
git clone --depth 1 https://github.com/gomilesf/convergo

Made for: Claude Code.

Or install convergo, the plugin that ships this one along with the rest of its 11 skills.

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 cvg-build-loop

README.md
[![agentmods](https://agentmods.dev/badge/skills/gomilesf/convergo/cvg-build-loop.svg)](https://agentmods.dev/skills/gomilesf/convergo/cvg-build-loop)
Your own site
<a href="https://agentmods.dev/skills/gomilesf/convergo/cvg-build-loop"><img src="https://agentmods.dev/badge/skills/gomilesf/convergo/cvg-build-loop.svg" alt="Measured on agentmods" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,388 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 5.1 $0.00049 $0.02388
Opus 5 $0.00024 $0.01194
Sonnet 5 $0.00010 $0.00478
Haiku 4.5 $0.00005 $0.00239

Measured 6d ago against content hash 4ecc61004350, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

cvg-build-loop 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 6d 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.

plugins/claude/skills/cvg-build-loop/SKILL.md · 265 lines

How it starts

The opening of the file, as written. The whole thing — 265 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Build Loop

Use this skill for implementation work that should be executed by a monitored specialist worker and reviewed by monitored specialist reviewers.

Before doing anything, open and read references/cvg-multi-session-protocol.md, then apply the protocol gates from cvg-multi-session:

  • transport binding gate,
  • real specialist session gate,
  • orchestrator callback transport gate,
  • waiting handoff gate,
  • cvg-code-review-feedback gate,
  • fresh-reviewer exit gate.

Phase 0: Orchestrator Setup

Record:

  • current orchestrator session id (Codex thread id; on Claude Code the harness tracks it),
  • implementation base commit with git rev-parse HEAD,
  • worktree status,
  • task-owned and unrelated dirty files,
  • source artifact or implementation goal,
  • allowed external side effects, if any,
  • the loop ledger path, created per the Gate 5 loop-ledger rule.

Pass unrelated dirty state to the worker and tell it not to overwrite those files.

If the plan's slices or invariant matrix span multiple repos, declare the repo split and build order to the user before spawning the worker, and scope this loop to one repo's slices: the loop's base/head and diff bookkeeping covers one repo, so changes outside it escape review entirely. Instruct the worker not to modify other repos. Run one loop per repo, and carry every repo this loop does not cover into the completion summary as a blocking known gap — a single-repo exit is never plan completion.

Phase 1: Worker Handoff

Spawn the worker as a real specialist session (Gate 0 spawn operation) and record the id returned by the tool. Verify it per Gate 1; if it is not verifiable, do not continue.

Worker prompt must include:

  • role: implementation worker,
  • callback destination per Gate 2,
  • required work skill, such as cvg-work or another user-specified implementation skill,
  • base commit,
  • worktree path,
  • dirty-state warning when present,
  • plan path or implementation goal,
  • implementation notes path only when the plan or repo convention requires one,
  • task-specific external side-effect boundary,
  • callback transport block,
  • callback templates.

Read the full file on GitHub · 265 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 6d ago First seen · 265 lines · 49 tokens per session scan A 4ecc61004350

Subscribe to this mod's changes

cvg-build-loop is a skill published in the GitHub repository gomilesf/convergo (7 stars, last pushed 1mo ago), licensed MIT. It adds 49 tokens to every session and 2,388 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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