[WIP] Fix broken action versions and runner issues

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

Fix the following broken agent/workflow issues in .github/workflows/. Only change what's broken; preserve all existing logic and style.

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1. .github/workflows/lint-format.yml — broken action versions

These pinned versions do not exist and will fail:

• actions/checkout@v6.0.2 → fix to actions/checkout@v4
• actions/setup-python@v6 → fix to actions/setup-python@v5
• python-version: '3.14' → fix to '3.13' (latest stable)

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2. .github/workflows/jules-performance-improver.yml — wrong runner + missing schedule

• runs-on: ubuntu-slim is not a valid GitHub-hosted runner → change to ubuntu-latest
• The on: block only has workflow_dispatch: but AGENTS.md documents the trigger as "Daily at 4 AM UTC" → add the schedule back:

  schedule:
    - cron: '0 4 * * *'

• The prompt is generic web-app boilerplate (React, N+1 queries, DB indexes) that has zero relevance to this shell-script-only repo. Replace the prompt body with shell/bash-specific performance guidance matching the repo's actual content (bash builtins vs forks, mapfile vs loops, xargs -P parallelism, hyperfine benchmarking, etc). Keep the agent persona "TURBO" and the PR format section.
• permissions: contents: read — Jules needs to be able to create branches/PRs → change to contents: write and add pull-requests: write

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3. .github/workflows/jules-weekly-cleanup.yml — wrong permissions + irrelevant prompt

• permissions: contents: read → change to contents: write, add pull-requests: write
• The prompt focus areas reference web-app patterns (React, imports, etc) irrelevant to a shell/bash repo. Replace with shell-script-specific cleanup tasks: unused functions, dead variable assignments, redundant fallback chains, inconsistent error handling patterns, WIP scripts past their prime. Keep the "Do not open a PR if you do not have a validated and impactful change." rule.

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Style constraints

• 2-space indent throughout YAML
• Preserve all comments, concurrency groups, step names, and ordering that are not explicitly mentioned above
• Do not add new steps, jobs, or workflows

The following is the prior conversation context from the user's chat exploration (may be truncated):

User: fix the agent mode

Assistant: Now I have the full picture. Here's the diagnosis:

Issues found across the agent/workflow setup:

lint-format.yml — actions/checkout@v6.0.2 doesn't exist (latest is v4), actions/setup-python@v6 doesn't exist (latest is v5), python-version: '3.14' doesn't exist yet. These will cause the workflow to fail immediately.

jules-performance-improver.yml — runs-on: ubuntu-slim is not a valid GitHub-hosted runner label; should be ubuntu-latest. The trigger is workflow_dispatch only, but AGENTS.md says "Daily at 4 AM UTC" — schedule is missing entirely.

jules-weekly-cleanup.yml — The prompt is generic web-app boilerplate (React.memo, N+1 queries, database indexes — none of which exist in this shell-script-only repo). Also permissions: contents: read is insufficient if Jules needs to create a PR/branch.

AGENTS.md workflow table lists jules-performance-improver.yml trigger as "Daily at 4 AM UTC" but the actual file has no schedule.

I'll fix all of these now.

Assistant: We're waiting for your response to the agent mode dialog to continue.

This pull request was created from Copilot chat.

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