nebula: Skill for Claude Code

.claude/skills/transcript-lookup/SKILL.md

transcript-lookup is a skill for Claude Code from AgentSystemLabs/nebula. It costs 141 tokens per session (602 once invoked), scanned A, original, MIT.

Pull a past tool call and what it printed out of the CLAUDE TRANSCRIPT (/.claude/projects/ / .jsonl) by a text needle or regex, across this checkout and its worktrees, with .claude/memory/transcript.py. Use when the user asks why a Claude session did something, what a truncated Bash call really ran, whether a GUARD…

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: reads .claude/ paths; mentions Claude Code.

This is AgentSystemLabs/nebula's own configuration. It tells Claude Code how to work on nebula itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything nebula configures →

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python3 .claude/memory/transcript.py '<text from the call as displayed>' # substring, this checkout + worktrees.

Reuse

Borrowing it

Nothing to install: this file belongs to AgentSystemLabs/nebula. 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/AgentSystemLabs/nebula/main/.claude/skills/transcript-lookup/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/AgentSystemLabs/nebula

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.

agentmods badge for transcript-lookup

README.md
[![agentmods](https://agentmods.dev/badge/skills/agentsystemlabs/nebula/transcript-lookup.svg)](https://agentmods.dev/skills/agentsystemlabs/nebula/transcript-lookup)
Your own site
<a href="https://agentmods.dev/skills/agentsystemlabs/nebula/transcript-lookup"><img src="https://agentmods.dev/badge/skills/agentsystemlabs/nebula/transcript-lookup.svg" alt="Measured on agentmods" height="20"></a>
Per session 141 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 602 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 unknown 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00141 $0.00602
Opus 5 $0.00071 $0.00301
Sonnet 5 $0.00028 $0.00120
Haiku 4.5 $0.00014 $0.00060

Measured today against content hash a1de51522e77, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

transcript-lookup 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 today.

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/skills/transcript-lookup/SKILL.md · 35 lines

What it actually says

Claude Code shows a long Bash call as its first lines plus , and a GUARD HOOK block names the rule, not the fragment it matched — so what a SESSION ran and what came back are questions the screen cannot answer. The CLAUDE TRANSCRIPT can: every tool_use sits next to its tool_result.

Run it

python3 .claude/memory/transcript.py '<text from the call as displayed>'   # substring, this checkout + worktrees
python3 .claude/memory/transcript.py --regex '<pattern>'                    # e.g. a GUARD HOOK rule's regex
python3 .claude/memory/transcript.py --chars 0 '<needle>'                   # whole results (default 1,200 chars)

Each hit prints the session id, timestamp and tool, the full call text, then the result. --slug reads another project's transcripts (a WORKTREE session lives under this checkout's slug plus the worktree path, which the default prefix match already covers); --session <id prefix> narrows to one session.

Read it

  • Pick a needle from the displayed head of the call (echo "--- remote tag 22?"), not from what you guess the tail holds; the hit shows the tail.
  • To test a block, feed the printed command back through the hook: echo '{"tool_name":"Bash","tool_input":{"command":"…"}}' | python3 .claude/hooks/guard.py — or run the rule's regex over it with --regex. The 2026-09-05 audit found a "false positive" that was a real for b in $(…) past the , and a rule premise three transcripts contradicted.
  • A result that is silent is evidence too: check whether the call's failure branch would have printed before recording that it "silently did nothing".
  • Quote the session id and timestamp in the reply and in the MEMORY LOG entry so the next agent can re-run the same lookup.
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.

  1. today First seen · 35 lines · 141 tokens per session scan A a1de51522e77

Subscribe to this mod's changes

transcript-lookup is a skill published in the GitHub repository AgentSystemLabs/nebula (106 stars, last pushed today), licensed MIT. It adds 141 tokens to every session and 602 once invoked, about $0.0007 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 2026-09-06.

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