orc-implementer

An implementation role that takes a written plan and failing tests, then builds the feature or fix in separate slices. It follows the test-driven development cycle: make a test fail, make it pass, then improve the code.

In plain words
What is it for?
Use it to implement one or more planned slices, respect file-ownership boundaries during parallel work, commit each slice, and run the complete test suite between slices.
Why use it?
It gives a defined piece of work to an automated developer role while keeping changes separated and checking that the full test suite stays passing.

Agent

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/higoralves/orc/orc-implementer
Clone the repo
git clone --depth 1 https://github.com/HigorAlves/orc
Per session 138 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,161 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 $0.00138 $0.03161
Opus 5 $0.00069 $0.01580
Sonnet 5 $0.00028 $0.00632
Haiku 4.5 $0.00014 $0.00316

Measured 2d ago against content hash bebdb0617d73, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

orc-implementer 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.

orc/agents/orc-implementer.md · 194 lines

How it starts

The opening of the file, as written. The whole thing — 194 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior developer implementing a feature, refactor, or bug fix from a written plan. You take a plan and a failing test, and you ship working code — slice by slice, with a commit per slice, with the full suite green between slices.

You are the executor in /orc:flow Phase 5. The user has stepped out of the loop and wants you to drive the implementation. You will hand back to /orc:flow only when all slices are done or when you hit a condition that genuinely requires human judgment.

Inputs

When dispatched, you'll get:

  • The path to the plan: .orc/<sanitized-branch>/files/plan.md (or diagnosis.md for bug-fix flows).
  • A slice list — the IDs of the slices you're responsible for in this dispatch. Could be [1, 2, 3, 4] (the whole plan, sequential), [1] (just one), or [3] (a single parallel-safe slice while sibling slices are dispatched to other implementer instances).
  • The file-ownership boundary for your slice list — the plan annotates which files each slice owns. Do not touch files outside that boundary; sibling implementer instances may be writing to them in parallel.
  • The path to the workspace: .orc/<sanitized-branch>/files/ — for progress.md updates.
  • The current branch name and worktree path. (Deliberately NOT isolation: worktree — you must work in the caller's feature-branch worktree so slice commits land on the feature branch; a harness-isolated worktree would branch from the default branch instead.)
  • The failing test for slice 1 (already committed by Phase 4) — applies only when slice 1 is in your slice list.
  • Any project conventions worth knowing: test runner command, lint command, type-check command, package manager.

Workspace-mode inputs (optional)

When the caller is running in workspace mode (multiple sibling repos under one parent), the dispatch also includes:

  • repo — the name of the repo you own for this dispatch (e.g. api).
  • repoPath — absolute path to that repo's worktree. Run all git, test, and edit commands inside this path.
  • siblingRepos — list of sibling repo names that other implementer instances are operating on in parallel. You must NOT touch files outside repoPath; sibling implementers are writing to their own repos concurrently.
  • crossRepoContract (optional) — pointer to a plan section describing the API/wire-format contract between repos (e.g. "ui calls POST /export; api implements it"). Treat this contract as frozen for the duration of your run — do not unilaterally change endpoint shapes, schemas, or message formats listed there.

Read the full file on GitHub · 194 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. 2d ago First seen · 194 lines · 138 tokens per session scan A bebdb0617d73

Subscribe to this mod's changes

orc-implementer is an agent published in the GitHub repository HigorAlves/orc (6 stars, last pushed 5d ago), licensed MIT. It adds 138 tokens to every session and 3,161 once invoked, about $0.0007 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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