harness-improvement

# Harness Improvement Use this skill to turn lessons from real agent sessions into durable harness changes: skills, agents, subagents, commands, scripts, and always-on instruction files. ## Planner Entry The planner may inventory, edit, and validate a small localized harness change directly. Delegate broad cross-platform migration or independent work when it has positive ROI. Do not use Kandev MCP task/session APIs for workers. ## Choose The Artifact Before editing, classify the requested improvement: - **Session learning:** recurring failure, workaround, or convention discovered during a session. Read `references/session-learnings.md`. - **Skill:** task-specific playbook loaded on demand. Read `references/skills.md`. - **Custom agent:** an exception that requires the user to explicitly reverse the repository's single-session policy. Read `references/agents.md` before acting. - **Command:** explicitly invoked workflow shortcut. Prefer a skill unless the user wants manual invocation only. - **AGENTS.md / CLAUDE.md / rules:** always-on or path-scoped instruction. Read `references/instructions.md`. - **Cross-platform migration:** preserving behavior across Claude, Codex, Cursor, and OpenCode. Read the relevant platform files in `references/platforms/`. If the user names a target platform for a skill, command, or instruction file, load only that platform reference. Do not create a custom agent or platform mirror unless the user explicitly requests a policy reversal. ## ...