u/Dramatic_Squash_3502

• NEW: Tool Description: Agent (simple usage notes) — Simplified usage notes for the Agent tool covering when to delegate, fork behavior, resumption, worktree isolation, background execution, parallel launches, and context restrictions.
• Agent Prompt: Security monitor for autonomous agent actions (second part) — Expands the Self-Modification rule from a vague description to an explicit list of agent-config paths (.claude/settings.json, CLAUDE.md, CLAUDE.local.md, .claude.json, .claude/rules/, .claude/hooks/, .claude/commands/, .claude/agents/, .claude/skills/, .claude/output-styles/, .claude/workflows/, .claude/routines/, .claude/scheduled_tasks.json, .claude/loop.md, .mcp.json), and carves out exceptions so files under .claude/worktrees/<name>/ are treated as ordinary project files and a project-specific .claude/ subdirectory outside the listed paths is not Self-Modification on its own.
• Agent Prompt: Worker fork — Minor wording cleanup: drops "in your system prompt" from the "default to forking" reference so the rule applies generically to parent guidance.
• Tool Description: Snooze (delay and reason guidance) — Adds an explicit warning not to schedule short-interval wakeups to poll for harness-tracked background work (since the agent is re-invoked automatically when it finishes); instead use a long 1200s+ fallback heartbeat. Reframes the under-5-minute cache window as appropriate for actively polling external state the harness can't notify about (CI runs, deploys, remote queues), and updates the example from a bun build to a CI run.
• Tool Description: Write (read existing file first) — Rewrites the description into a "When to use" format that names creating a new file or fully replacing a previously-read file as the use cases, and points at the edit tool for partial changes.

Details: https://github.com/Piebald-AI/claude-code-system-prompts/releases/tag/v2.1.140

• REMOVED: System Prompt: Phase four of plan mode — Removed the standalone phase-four plan-mode prompt; the active plan-mode reminder now receives phase-four instructions through its own template placeholder.
• Skill: Debugging — Adds the provided issue description before the issue section and lets daemon debug context supply the fallback issue guidance when the user does not describe a specific problem.
• System Prompt: Proactive schedule offer after follow-up work — Raises the confidence bar for offering /schedule follow-ups from 70%+ to 85%+ odds the user will say yes.
• System Reminder: New diagnostics detected — Formats new diagnostics from the diagnostics list instead of inserting only the precomputed diagnostics summary.
• System Reminder: Plan mode is active (5-phase) — Replaces the phase-four function hook with a direct phase-four-instructions placeholder in the active plan-mode workflow.

Details: https://github.com/Piebald-AI/claude-code-system-prompts/releases/tag/v2.1.122