A command that replays the recorded activity of a completed ACR task, including its provider, token counts, duration, and events in time order.

Use it to investigate a task by ID or find recent task IDs when none is supplied.

It makes a task’s result and execution history inspectable instead of leaving you to infer what happened.

How hbkdad/arc configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to hbkdad/arc. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/hbkdad/arc/main/.claude/commands/acr-explain.md

Clone the repo

git clone --depth 1 https://github.com/hbkdad/arc

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/commands/hbkdad/arc/acr-explain/github.svg)](https://agentmods.dev/commands/hbkdad/arc/acr-explain)

Your own site

<a href="https://agentmods.dev/commands/hbkdad/arc/acr-explain"><img src="https://agentmods.dev/badge/commands/hbkdad/arc/acr-explain/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.

Your own site · 80×15

<a href="https://agentmods.dev/commands/hbkdad/arc/acr-explain"><img src="https://agentmods.dev/badge/commands/hbkdad/arc/acr-explain.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 16 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 189 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00016	$0.00189
Opus 5.5	$0.00006	$0.00076
Sonnet 5.5	$0.00003	$0.00038
Haiku 4.5	$0.00002	$0.00019

Measured 2mo ago against content hash 3496dd5cacc1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

acr-explain 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 2mo 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.

.claude/commands/acr-explain.md · 9 lines

What it actually says

Run uv run acr explain $ARGUMENTS from the repo root and report what it shows: objective, final status, which provider handled it, token counts, total duration, and the chronological event sequence. If the task id doesn't exist, say so plainly -- don't guess at what a valid task might have looked like.

If $ARGUMENTS is empty, there's no dedicated acr tasks list command -- instead query the real tasks table directly (e.g. sqlite3 data/acr.db "select id, objective, status, created_at from tasks order by created_at desc limit 10", adjusting the db path from acr doctor's output if it differs) to show recent task ids so the user can pick one, rather than failing silently.

Changes

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.

2mo ago First seen · 9 lines · 16 tokens per session scan A 3496dd5cacc1

Subscribe to this mod's changes

acr-explain is a command published in the GitHub repository hbkdad/arc (4 stars, last pushed 3mo ago), licensed MIT. It adds 16 tokens to every session and 189 once invoked, about $0.0001 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 2026-08-31.

Analytics and metrics Debugging LLM ai-agents ai-orchestration cli developer-tools local-first

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arc: Command for Claude Code