Inspect first. Separate facts, assumptions, and unknowns.
Workflow skills for coding agents
Good code starts with
better judgment.
Keystone gives coding agents a disciplined way to understand, plan, build, review, and ship—without mixing the jobs or skipping the proof.
Works with
CodexClaude CodePi
›
Review this branch for correctness, regressions, and missing tests.
Keystone selects
change-review
Why Keystone
Agents don’t need more autonomy.
They need clearer boundaries.
A coding task is rarely one task. Understanding, deciding, changing, checking, and delivering each demand a different posture.
Without Keystone
Editing starts before the repository is understood.
Without Keystone
Debugging becomes a sequence of plausible guesses.
With Keystone
Each phase has a contract, evidence bar, and stopping point.
One continuous workflow
Nine skills.
One standard of proof.
Start at the phase your work actually needs. Keystone keeps that phase focused, then makes the next handoff explicit.
Resolve behavior, scope, tradeoffs, and acceptance criteria.
Change the smallest safe surface and prove the result.
Try to disprove readiness without quietly fixing the work.
Finalize only when proof and review are already present.
The complete toolkit
A specialist for
every kind of work.
Each skill is model-discoverable and directly invocable. All nine ship together with one shared set of gates and standards.
01
context-survey
↗
02Establish what is true before deciding what to change.
product-planning
↗
03Shape behavior, experience, scope, and technical direction.
task-creation
↗
04Turn approved direction into executable, verifiable work.
implementation
↗
05Make scoped changes through isolation, red, green, and proof.
refactoring
↗
06Improve structure while preserving observable behavior.
root-cause-analysis
↗
07Reproduce failures and prove causes before proposing fixes.
change-review
↗
08Find blockers, regressions, and unproved assumptions.
shipping
↗
09Commit, package, release, or hand off completed work.
project-audit
↗
Scan a project for drift, fragility, and maintenance risk.
Built into every skill
Evidence before action
Inspect the real repository, reproduce the failure, and state the unknowns before changing anything.
Boundaries stay visible
Planning does not quietly become implementation. Review does not quietly become fixing.
Proof before completion
Passing checks, observed behavior, and explicit gaps replace “this should work.”
Open source · MIT licensed
Give your agent
a better way to work.
Install Keystone once. The complete package includes all nine skills and their shared workflow contracts.
codex plugin marketplace add static-var/Keystone --ref main
codex plugin add keystone --marketplace keystone
Add the static-var/Keystone marketplace, then install the complete plugin.