Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/arittr/spectacular/executing-plannpx skills add arittr/spectacular --skill executing-plangit clone --depth 1 https://github.com/arittr/spectacularWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00032 | $0.05704 |
| Opus 5 | $0.00016 | $0.02852 |
| Sonnet 5 | $0.00006 | $0.01141 |
| Haiku 4.5 | $0.00003 | $0.00570 |
Grade A, and why
executing-plan scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 648 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Executing Plans
Overview
This skill orchestrates the execution of implementation plans generated by the decomposing-tasks skill. It handles the complete lifecycle of plan execution including worktree verification, resume detection, phase-by-phase execution (sequential or parallel), quality verification, and final stack completion.
When to Use
Use this skill when:
- Executing an implementation plan from
/spectacular:execute - Resuming interrupted plan execution
- Orchestrating multi-phase feature implementation
Announce: "I'm using executing-plan to orchestrate implementation of the plan."
Architecture
The execute command uses an orchestrator-with-embedded-instructions architecture for cognitive load reduction:
Orchestrator Skills (executing-sequential-phase, executing-parallel-phase)
- Responsibilities: Setup, worktree management, dispatch coordination, code review orchestration
- Size: ~464 lines (sequential), ~850 lines (parallel)
- Dispatches: Task tool with embedded execution instructions (~150 lines per task)
- Focus: Manages workflow lifecycle, embeds focused task instructions for subagents
Verification Skill (phase-task-verification)
- Responsibilities: Shared git operations (add, branch create, HEAD verify, detach)
- Size: ~92 lines
- Used by: Task subagents via Skill tool (both sequential and parallel)
- Focus: Eliminates duplication of branch creation/verification logic
Cognitive Load Reduction:
- Original: 750-line monolithic skills (orchestration + task + verification mixed)
- Current: Subagents receive ~150 lines of focused task execution instructions via Task tool
- Benefit: 80% reduction in content subagents must parse (only see task instructions, not orchestration)
- Verification: Shared 92-line skill eliminates duplication
Maintainability benefit: Orchestrator features (resume support, enhanced error recovery, verification improvements) can be added without affecting task execution instructions. Subagents receive focused, consistent instructions while orchestrators handle workflow complexity.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 648 lines · 32 tokens per session scan A 584270d847f6
executing-plan is a skill published in the GitHub repository arittr/spectacular (20 stars, last pushed 7mo ago), licensed MIT. It adds 32 tokens to every session and 5,704 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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