A practical, evidence-first software delivery workflow for coding agents.
SDLC Toolkit helps coding agents move from a request to a review-ready change with clear requirements, focused implementation, direct behavior verification, and disciplined review. It brings the structure of a strong software development lifecycle into the repository so agent-assisted work stays grounded, efficient, and easy to evaluate.
Coding agents are most effective when each step has a clear purpose and a concrete result. SDLC Toolkit provides that structure without forcing every change through the same ceremony.
- Evidence before assumptions — decisions are grounded in the repository, executable behavior, and explicit requirements.
- The right workflow for the change — quick changes stay quick, while features, defects, and higher-risk work receive the depth they need.
- Focused engineering roles — planning, implementation, verification, and review remain clear and accountable.
- Risk-aware review — specialist review activates when changes affect security boundaries, public contracts, stored data, or concurrency behavior.
- Review-ready outcomes — local checks and revision-bound evidence provide a clear handoff for normal human and pull-request review.
- Portable adoption — use the toolkit with Codex or Claude Code and adapt it to the commands and policies of each repository.
SDLC Toolkit guides agent-assisted engineering through the activities that make a software change trustworthy:
- Clarifies the required behavior and unresolved product decisions.
- Identifies the relevant code, contracts, tests, and change surface.
- Selects and plans the smallest coherent implementation.
- Implements the change while preserving established behavior.
- Executes the changed software against its acceptance criteria.
- Reviews the final change for material correctness and applicable engineering risks.
- Produces local readiness evidence for the exact revision under review.
The repository includes ready-to-adapt implementations for:
Each implementation follows the same SDLC model while using the native project conventions of its coding environment.
- Choose the Codex or Claude Code implementation.
- Copy that implementation into the root of the repository where it will be used.
- Merge it with any existing repository instructions and agent configuration.
- Configure the repository's real build, lint, test, and security commands.
- Run the included validation and evaluation commands.
- Start the coding agent from the repository and use the workflow appropriate to the change.
For a complete walkthrough, see the Codex user guide. It covers installation, configuration, daily workflows, verification, preflight, and maintenance.
- Git
- Python 3.11 or later
- Codex or Claude Code for the selected implementation
SDLC Toolkit is available under the MIT License. It may be used, modified, and distributed in commercial and non-commercial projects.