Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add umputun/cc-thingz/plugin install planningWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/umputun/cc-thingz/exec)<a href="https://agentmods.dev/skills/umputun/cc-thingz/exec"><img src="https://agentmods.dev/badge/skills/umputun/cc-thingz/exec/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/umputun/cc-thingz/exec"><img src="https://agentmods.dev/badge/skills/umputun/cc-thingz/exec.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What 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 5.1 | $0.00041 | $0.07540 |
| Opus 5.5 | $0.00016 | $0.03016 |
| Sonnet 5.5 | $0.00008 | $0.01508 |
| Haiku 4.5 | $0.00004 | $0.00754 |
Grade A, and why
exec 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 1mo 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 — 307 lines — stays where its author put it; the contents beside it link to each section on GitHub.
exec
Execute plan file tasks sequentially, each in an isolated subagent.
Arguments
$ARGUMENTS— path to plan file (optional; if omitted, ask user to pick fromplans_diruserConfig directory, default:docs/plans/)
File Resolution
ALWAYS use the resolve script to read prompt and agent files. NEVER construct the override chain manually:
bash ${CLAUDE_PLUGIN_ROOT}/skills/exec/scripts/resolve-file.sh prompts/task.md ${CLAUDE_PLUGIN_DATA}
bash ${CLAUDE_PLUGIN_ROOT}/skills/exec/scripts/resolve-file.sh agents/quality.txt ${CLAUDE_PLUGIN_DATA}
The script checks project overrides, user overrides, and bundled defaults automatically.
Placeholder Substitution
After reading a prompt file, replace ALL placeholders with actual values before passing to a subagent. Subagents run in fresh contexts without plugin env vars.
Always substitute: PLAN_FILE_PATH, PROGRESS_FILE_PATH, DEFAULT_BRANCH, ${CLAUDE_PLUGIN_ROOT} (resolve to actual absolute path), RESOLVE_SCRIPT (absolute path to ${CLAUDE_PLUGIN_ROOT}/skills/exec/scripts/resolve-file.sh), PLUGIN_DATA_DIR (resolved ${CLAUDE_PLUGIN_DATA} path — passed as second argument to resolve-file.sh so it can find user overrides), USER_RULES (resolved custom rules content from the rules loading step, or empty string if no rules found), and phase-specific values (FINDINGS_LIST, REVIEW_PHASE, DIFF_COMMAND).
Custom Rules Loading
Before starting execution, run this command via Bash tool to check for user-provided custom rules:
bash ${CLAUDE_PLUGIN_ROOT}/scripts/resolve-rules.sh planning-rules.md ${CLAUDE_PLUGIN_DATA}
If the output is non-empty, store it as the resolved custom rules content. When substituting USER_RULES in task prompts, wrap the content with a label so the subagent understands it: use "ADDITIONAL CUSTOM RULES:\n" as the substitution. If the output is empty, substitute an empty string for USER_RULES. See ${CLAUDE_PLUGIN_ROOT}/references/custom-rules.md for full documentation on the rules mechanism.
What ships with it
24 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/agents/documentation.txt 1.3 KB
- references/agents/implementation.txt 1.2 KB
- references/agents/quality.txt 1.6 KB
- references/agents/simplification.txt 2.3 KB
- references/agents/smells.txt 1.8 KB
- references/agents/testing.txt 1.5 KB
- references/prompts/codex-review.md 1.4 KB
- references/prompts/finalizer.md 2.4 KB
- references/prompts/fixer.md 2.9 KB
- references/prompts/progress-file.md 2.0 KB
- references/prompts/review.md 6.3 KB
- references/prompts/stats.md 4.2 KB
- references/prompts/task.md 4.6 KB
- scripts/append-progress.sh 539 B runs code
- scripts/create-branch.sh 5.3 KB runs code
- scripts/customize-file.sh 4.0 KB runs code
- scripts/detect-branch.sh 1.9 KB runs code
- scripts/detect-vcs.sh 410 B runs code
- scripts/init-progress.sh 451 B runs code
- scripts/move-plan.sh 1.3 KB runs code
- scripts/resolve-file.sh 1.4 KB runs code
- scripts/run-codex.sh 1.9 KB runs code
- scripts/run-external-review.sh 3.4 KB runs code
- scripts/stage-and-commit.sh 2.6 KB runs code
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.
- 1mo ago Changed f1cfd7238fb7
- 1mo ago First seen · 307 lines · 41 tokens per session scan A 62ca4eb287f7
exec is a skill published in the GitHub repository umputun/cc-thingz (486 stars, last pushed 10d ago), licensed MIT. It adds 41 tokens to every session and 7,540 once invoked, about $0.0002 per session on Opus 5.5. 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.
Other skills, from other repositories
plugin
Manage Claude Code plugins — add marketplaces, install, update, remove, list. Use when installing plugins, checking status, or managing the registry.
flow-next-sync
Manually trigger plan-sync to update downstream task specs after implementation drift. Use when code changes outpace specs.
flow-next-visual
Restate a spec, a task, a diff, or the current topic visually as a compact markdown digest. Use when asked to 'show me', 'explain this visually', 'restate that', 'digest the plan', 'walk me through the spec', 'walk me through the tasks', 'walk me through the diff', or when the output is too much text and a shape would…
flow-next-flow
Use first in a Flow-Next repo for a spec id, change, bug, issue, slow code or metric, cleanup, design fork, dump to explain, repeated mistake, prompt change, what could break, what next. No quick asks.
flow-next-impl-review
Carmack-level implementation review of changes via the configured backend. Use when asked to review code or a diff in a flow-next repo.
flow-next-spec-completion-review
Verify that a spec's completed tasks fully implement the spec requirements. Use at spec completion before close.