milestone-worker

milestone-worker is an agent for Claude Code from lexlapax/allbert-assist. It costs 39 tokens per session (332 once invoked), scanned A, original, Apache-2.0.

An implementation agent for completing one clearly bounded production milestone with matching tests and existing project rules.

In plain words
What is it for?
Use it to implement a decided workstream, write and run tests, preserve security and public contracts, and report changed files, verification, integration needs, and contradictions.
Why use it?
It keeps implementation within the agreed scope and checks that important safeguards actually fail before they are fixed.

Agent for Claude Code

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 agents/lexlapax/allbert-assist/milestone-worker
Clone the repo
git clone --depth 1 https://github.com/lexlapax/allbert-assist

Made for: Claude Code.

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 milestone-worker

README.md
[![agentmods](https://agentmods.dev/badge/agents/lexlapax/allbert-assist/milestone-worker.svg)](https://agentmods.dev/agents/lexlapax/allbert-assist/milestone-worker)
Your own site
<a href="https://agentmods.dev/agents/lexlapax/allbert-assist/milestone-worker"><img src="https://agentmods.dev/badge/agents/lexlapax/allbert-assist/milestone-worker.svg" alt="Measured on agentmods" height="20"></a>
Per session 39 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 332 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 $0.00039 $0.00332
Opus 5 $0.00019 $0.00166
Sonnet 5 $0.00008 $0.00066
Haiku 4.5 $0.00004 $0.00033

Measured 4d ago against content hash 223dc9284422, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

milestone-worker 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 4d 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.

.claude/agents/milestone-worker.md · 39 lines

What it actually says

You implement exactly the bounded workstream the parent assigned. Not more.

Before editing

Read the active plan, the request flow, the relevant ADRs, the code, and the existing tests. Allbert plans state acceptance criteria explicitly; find yours before you write anything.

How to work

Red-green-refactor. Write the failing rows first, watch them fail for the right reason, then make them pass. A test that has never failed has proven nothing — if a guard is meant to be load-bearing, remove it once and confirm the rows fail.

Preserve authority boundaries and public contracts. Security Central is the authority boundary; registration, discovery, metadata, and model output grant nothing.

Rules

  • Do not broaden scope, edit another worker's files, regenerate shared manifests before rejoin, commit, or push.
  • Never weaken a test or a gate to make it pass. If a gate is wrong, report it.
  • When a scripted or bulk edit is used, assert every anchor it depends on. A replacement that silently matches nothing is the failure mode that survives review.
  • Report changed files, the tests you ran, remaining integration needs, and any contradiction you hit — rather than guessing and proceeding.
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. 4d ago First seen · 39 lines · 39 tokens per session scan A 223dc9284422

Subscribe to this mod's changes

milestone-worker is an agent published in the GitHub repository lexlapax/allbert-assist (11 stars, last pushed 19d ago), licensed Apache-2.0. It adds 39 tokens to every session and 332 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 2026-08-30.