finn-build: Design & UI for AI Agents | OpenAgentSkill

Overview

Claim the next safe agent-ready issue from Linear, implement it, and open a PR. Use when asked to run Finn-loop's builder, work the approved queue, or fix Finn-loop review feedback. Designed for /loop; one pass does one unit of work.

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Finn-loop builder

One pass = one unit of work: fix review feedback on one existing PR, or build one issue end to end. Under /loop, each iteration runs this skill once.

0. Preflight

Before changing Linear, GitHub, branches, or files:

Confirm this is the intended GitHub repository and origin is reachable.
Detect the repository's default branch with gh repo view --json defaultBranchRef --jq .defaultBranchRef.name; never assume it is main.
Require a clean working tree (git status --porcelain must be empty). If it is dirty, report the paths and end the pass. Never stash, reset, overwrite, or commit unrelated work.

1. Review feedback first

List open PRs labeled loop-changes-requested, including their labels:

gh pr list --state open --label loop-changes-requested --json number,title,headRefName,headRefOid,labels,updatedAt,url

Skip every PR carrying needs-human-review; it has left the automated repair queue until a human resolves the escalation.

If any PR remains, choose the least recently updated one. Read its linked Linear issue and latest Finn-loop review of COMMIT_SHA verdict. Check out its branch, fix only the "Must fix before merge" items, run the relevant checks, push, remove loop-changes-requested, and comment with what changed. End this pass.

If a proposed fix would cross an issue non-goal or requires a product decision, do not implement it. Comment the exact conflict, add needs-human-review, remove loop-changes-requested, and end the pass. This prevents the next loop iteration from retrying a decision only a human can make.

2. Pick

Using the Linear connector, list issues on team TEAM that meet every condition:

labeled agent-ready
unassigned
not labeled blocked
no unresolved blocker relation

Sort by priority, then oldest first. If the queue is empty, say so and end the pass. Do not invent work and do not pick a blocked issue.

3. Claim (the cooperative lock)

Assign yourself and move the issue to the team's started workflow state (prefer In Progress when available). Claim before reading deeply or writing code. Re-fetch the issue immediately after the update; if it is blocked, assigned to somebody else, or no longer agent-ready, do not work it and return to step 2.

The assignee prevents different people from taking the same issue. It is not an atomic lock between simultaneous sessions authenticated as the same Linear user, so only one builder loop may run per team.

4. Read

Fetch the full issue including comments and relations. Implement only its acceptance criteria. Non-goals are binding. Compare every AC-N against every NG-N before editing. No unrelated changes and no opportunistic refactors.

If an acceptance criterion is ambiguous, conflicts with a non-goal, or depends on an unresolved blocker, go to step 8. Never guess.

5. Build

Fetch the latest default branch from origin and create or resume a branch named TEAM-NNN-short-slug, using the issue's real identifier.
Implement the acceptance criteria using the repository's existing style, architecture, and naming.
Add or update tests when the change affects logic, data flow, permissions, integrations, or user-visible behavior.
Preserve behavior outside the issue contract.

6. Verify

Run the project's relevant lint, typecheck, build, and narrowest useful tests. All checks attributable to this change must pass before opening a PR. If a broad check has a pre-existing unrelated failure, run the relevant targeted check, preserve the evidence, and disclose both results in the PR.

Review git diff and git status before shipping. Stop if the diff contains unrelated work or generated secrets.

7. Ship

Push and open a PR with gh pr create. Its description must include:

What changed and why
Closes TEAM-NNN, using the real Linear issue identifier
A scope ledger: one evidence line per AC-N, one preservation line per NG-N, and Other behavior changes: None
Numbered manual test steps matching what was actually built
Automated checks run and their results
Risk: Low / Medium / High

If Other behavior changes: None is not true, stop and get the Linear issue amended before opening the PR.

Comment the PR URL on the Linear issue. Move it to the team's review state if one exists; otherwise leave it in the started state for the Linear-GitHub integration to manage. Never merge and never enable auto-merge. End the pass.

8. Blocked

Comment one specific question a human can answer asynchronously, apply the blocked label, and unassign yourself. Leave agent-ready in place: the pick query explicitly excludes blocked, so the issue safely reappears only after a human answers and removes that label.

Never use "this is unclear" as the question. State the exact decision, the available options, and which acceptance criterion it affects. End the pass so the next iteration can pick different work.

View source ↗

File metadata

name: finn-build
description: Claim the next safe agent-ready issue from Linear, implement it, and open a PR. Use when asked to run Finn-loop's builder, work the approved queue, or fix Finn-loop review feedback. Designed for /loop; one pass does one unit of work.

View original text

---
name: finn-build
description: Claim the next safe agent-ready issue from Linear, implement it, and open a PR. Use when asked to run Finn-loop's builder, work the approved queue, or fix Finn-loop review feedback. Designed for /loop; one pass does one unit of work.
---

# Finn-loop builder

One pass = one unit of work: fix review feedback on one existing PR, or build
one issue end to end. Under `/loop`, each iteration runs this skill once.

## 0. Preflight

Before changing Linear, GitHub, branches, or files:

- Confirm this is the intended GitHub repository and `origin` is reachable.
- Detect the repository's default branch with
  `gh repo view --json defaultBranchRef --jq .defaultBranchRef.name`; never
  assume it is `main`.
- Require a clean working tree (`git status --porcelain` must be empty). If it
  is dirty, report the paths and end the pass. Never stash, reset, overwrite,
  or commit unrelated work.

## 1. Review feedback first

List open PRs labeled `loop-changes-requested`, including their labels:

```bash
gh pr list --state open --label loop-changes-requested --json number,title,headRefName,headRefOid,labels,updatedAt,url
```

Skip every PR carrying `needs-human-review`; it has left the automated repair
queue until a human resolves the escalation.

If any PR remains, choose the least recently updated one. Read its linked
Linear issue and latest `Finn-loop review of COMMIT_SHA` verdict. Check out its
branch, fix only the "Must fix before merge" items, run the relevant checks,
push, remove `loop-changes-requested`, and comment with what changed. End this
pass.

If a proposed fix would cross an issue non-goal or requires a product decision,
do not implement it. Comment the exact conflict, add `needs-human-review`,
remove `loop-changes-requested`, and end the pass. This prevents the next loop
iteration from retrying a decision only a human can make.

## 2. Pick

Using the Linear connector, list issues on team `TEAM` that meet every
condition:

- labeled `agent-ready`
- unassigned
- not labeled `blocked`
- no unresolved blocker relation

Sort by priority, then oldest first. If the queue is empty, say so and end the
pass. Do not invent work and do not pick a blocked issue.

## 3. Claim (the cooperative lock)

Assign yourself and move the issue to the team's started workflow state
(prefer `In Progress` when available). Claim before reading deeply or writing
code. Re-fetch the issue immediately after the update; if it is blocked,
assigned to somebody else, or no longer `agent-ready`, do not work it and
return to step 2.

The assignee prevents different people from taking the same issue. It is not
an atomic lock between simultaneous sessions authenticated as the same Linear
user, so only one builder loop may run per team.

## 4. Read

Fetch the full issue including comments and relations. Implement only its
acceptance criteria. Non-goals are binding. Compare every `AC-N` against every
`NG-N` before editing. No unrelated changes and no opportunistic refactors.

If an acceptance criterion is ambiguous, conflicts with a non-goal, or depends
on an unresolved blocker, go to step 8. Never guess.

## 5. Build

- Fetch the latest default branch from `origin` and create or resume a branch
  named `TEAM-NNN-short-slug`, using the issue's real identifier.
- Implement the acceptance criteria using the repository's existing style,
  architecture, and naming.
- Add or update tests when the change affects logic, data flow, permissions,
  integrations, or user-visible behavior.
- Preserve behavior outside the issue contract.

## 6. Verify

Run the project's relevant lint, typecheck, build, and narrowest useful tests.
All checks attributable to this change must pass before opening a PR. If a
broad check has a pre-existing unrelated failure, run the relevant targeted
check, preserve the evidence, and disclose both results in the PR.

Review `git diff` and `git status` before shipping. Stop if the diff contains
unrelated work or generated secrets.

## 7. Ship

Push and open a PR with `gh pr create`. Its description must include:

- What changed and why
- `Closes TEAM-NNN`, using the real Linear issue identifier
- A scope ledger: one evidence line per `AC-N`, one preservation line per
  `NG-N`, and `Other behavior changes: None`
- Numbered manual test steps matching what was actually built
- Automated checks run and their results
- Risk: Low / Medium / High

If `Other behavior changes: None` is not true, stop and get the Linear issue
amended before opening the PR.

Comment the PR URL on the Linear issue. Move it to the team's review state if
one exists; otherwise leave it in the started state for the Linear-GitHub
integration to manage. Never merge and never enable auto-merge. End the pass.

## 8. Blocked

Comment one specific question a human can answer asynchronously, apply the
`blocked` label, and unassign yourself. Leave `agent-ready` in place: the pick
query explicitly excludes `blocked`, so the issue safely reappears only after
a human answers and removes that label.

Never use "this is unclear" as the question. State the exact decision, the
available options, and which acceptance criterion it affects. End the pass so
the next iteration can pick different work.

Review the source

Skill source recorded

Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.

Review before install: Avoid automatic install

License: MIT

Dependency or permission surface needs review
Permission surface may require sandboxing
Financial research output is not financial advice; require human review before any live investment decision
Financial research output is not financial advice; require human review before any live investment decision.
Quality score needs review
Permission surface needs review: secrets or environment access, shell or command execution
Dependency/runtime risk: command execution surface, credential or environment access
Permission surface: secrets or environment access, shell or command execution

Open full audit

Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.

Start with one small task

1Read the source. Confirm the input, expected output, dependencies and permissions.
2Ask your agent for a plan. Approve setup and any costs before running a small isolated test.
3

Source & usage notes

Indexed

Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.

Source repository: finna/Finn-loop
License: MIT
Version: 1.0.0
Last GitHub push: Jul 23, 2026
Registry updated: Sep 3, 2026
Instruction path: skills/finn-build/SKILL.md @ 7941b62c9461

Version reported in registry metadata; check source releases before relying on it.

Quality

65/100

Promising

Trust

63/100

Sandbox only

Agent access

This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.

Open install API LLM text format Open manifest Auto-resolve Plan

More details

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Creator: finna
Source: finna/Finn-loop
Indexed by: OpenAgentSkill community index

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Show the canonical listing, current trust and audit signals, and real Agent-Proven evidence where developers evaluate the repository.

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Preview badge Open audit Creator kit

Community signal

Share whether this skill looks useful for your agent workflow. Aggregated feedback improves rankings over time.