Fix Crane idle runs exiting as failures

[mrjf]

Summary

• make the Crane scheduler return success when no migrations are due
• emit has_work, not_due, and no_migrations GitHub Actions outputs
• gate Crane activation from pre-activation so idle scheduled runs skip the agent cleanly instead of failing
• add scheduler tests for both idle and due migration paths

Validation

• .venv/bin/python -m pytest tests/unit/test_crane_scheduler.py tests/unit/test_crane_workflow_prompt.py -q
• python3 -m py_compile .github/workflows/scripts/crane_scheduler.py
• gh aw compile crane
• gh aw validate crane
• git diff --check

[github-actions]

Migration Benchmark Results

• Commit: 661216857b2c8c2e7adcbdacb343dff8ea7eea17
• Run: https://github.com/githubnext/apm/actions/runs/27120115231

Migration CLI Benchmark

Includes fixture-backed commands that must read, write, execute, or fail against real project state. The installed-project fixture contains apm.yml, apm.lock.yaml, apm_modules packages, local .apm primitives, target directories, deployed prompt files, and sample source files.
The harness checks return-code parity for each command. Detailed stdout/stderr byte counts are kept in the JSON samples, but this is not an output-parity test.

Max allowed Go/Python median ratio: 5.00

Benchmark	Command	Fixture	Python median	Go median	Go/Python	Result	Return codes
init scaffold	init --yes	empty-project	0.3485s	0.0011s	0.00x	307.91x faster	{'python': [0], 'go': [0]}
targets json	targets --json	installed-project	0.3320s	0.0010s	0.00x	316.67x faster	{'python': [0], 'go': [0]}
script list	list	installed-project	0.3309s	0.0011s	0.00x	310.47x faster	{'python': [0], 'go': [0]}
deps list	deps list	installed-project	0.3394s	0.0011s	0.00x	310.42x faster	{'python': [0], 'go': [0]}
deps tree	deps tree	installed-project	0.3389s	0.0011s	0.00x	308.31x faster	{'python': [0], 'go': [0]}
install local package	install --no-policy ./packages/local-tools	local-install-project	0.3685s	0.0014s	0.00x	265.22x faster	{'python': [0], 'go': [0]}
compile copilot target	compile --target copilot	compilation-project	0.3518s	0.0012s	0.00x	303.88x faster	{'python': [0], 'go': [0]}
pack output	pack --output dist	installed-project	0.3529s	0.0012s	0.00x	306.65x faster	{'python': [0], 'go': [0]}
run script	run stamp	runnable-project	0.3399s	0.0018s	0.01x	186.35x faster	{'python': [0], 'go': [0]}
audit hidden unicode	audit --ci	audit-finding-project	0.3465s	0.0012s	0.00x	282.50x faster	{'python': [1], 'go': [1]}

Workloads

• init scaffold: Creates a new apm.yml in an otherwise empty project directory.
• targets json: Reads configured project targets from apm.yml and emits machine output.
• script list: Reads apm.yml scripts and renders the runnable script inventory.
• deps list: Scans apm_modules package directories and apm.lock.yaml metadata.
• deps tree: Builds a dependency tree from apm.lock.yaml and installed package metadata.
• install local package: Installs a local package and materializes lock/module state.
• compile copilot target: Discovers local primitives and writes the Copilot target artifact.
• pack output: Resolves local package contents and writes a distributable artifact.
• run script: Executes a project script and writes the script's side-effect file.
• audit hidden unicode: Scans a real installed file and fails on planted hidden Unicode.

[github-actions]

Migration Benchmark Results

• Commit: b91bcb86a659c5b3dfc7fff21e5582226eef054a
• Run: https://github.com/githubnext/apm/actions/runs/27120181422

Migration CLI Benchmark

Includes fixture-backed commands that must read, write, execute, or fail against real project state. The installed-project fixture contains apm.yml, apm.lock.yaml, apm_modules packages, local .apm primitives, target directories, deployed prompt files, and sample source files.
The harness checks return-code parity for each command. Detailed stdout/stderr byte counts are kept in the JSON samples, but this is not an output-parity test.

Max allowed Go/Python median ratio: 5.00

Benchmark	Command	Fixture	Python median	Go median	Go/Python	Result	Return codes
init scaffold	init --yes	empty-project	0.4384s	0.0013s	0.00x	340.41x faster	{'python': [0], 'go': [0]}
targets json	targets --json	installed-project	0.4237s	0.0013s	0.00x	316.26x faster	{'python': [0], 'go': [0]}
script list	list	installed-project	0.4261s	0.0013s	0.00x	327.39x faster	{'python': [0], 'go': [0]}
deps list	deps list	installed-project	0.4306s	0.0013s	0.00x	323.77x faster	{'python': [0], 'go': [0]}
deps tree	deps tree	installed-project	0.4291s	0.0013s	0.00x	331.53x faster	{'python': [0], 'go': [0]}
install local package	install --no-policy ./packages/local-tools	local-install-project	0.4676s	0.0018s	0.00x	262.57x faster	{'python': [0], 'go': [0]}
compile copilot target	compile --target copilot	compilation-project	0.4557s	0.0014s	0.00x	322.37x faster	{'python': [0], 'go': [0]}
pack output	pack --output dist	installed-project	0.4582s	0.0014s	0.00x	337.03x faster	{'python': [0], 'go': [0]}
run script	run stamp	runnable-project	0.4384s	0.0022s	0.01x	196.62x faster	{'python': [0], 'go': [0]}
audit hidden unicode	audit --ci	audit-finding-project	0.4542s	0.0016s	0.00x	292.41x faster	{'python': [1], 'go': [1]}

Workloads

• init scaffold: Creates a new apm.yml in an otherwise empty project directory.
• targets json: Reads configured project targets from apm.yml and emits machine output.
• script list: Reads apm.yml scripts and renders the runnable script inventory.
• deps list: Scans apm_modules package directories and apm.lock.yaml metadata.
• deps tree: Builds a dependency tree from apm.lock.yaml and installed package metadata.
• install local package: Installs a local package and materializes lock/module state.
• compile copilot target: Discovers local primitives and writes the Copilot target artifact.
• pack output: Resolves local package contents and writes a distributable artifact.
• run script: Executes a project script and writes the script's side-effect file.
• audit hidden unicode: Scans a real installed file and fails on planted hidden Unicode.