A debugging workflow that captures and examines thread backtraces with LLDB or GDB. A thread backtrace shows where each running part of a program is currently paused or working.

It is for diagnosing unresponsive applications, context-switching stalls, lock problems, blocked calls, and high-CPU loops across programming languages.

It helps locate the code causing hangs, deadlocks, frozen interfaces, stalled communication between processes, or loops using too much CPU.

debug-lldb — Skill by regenrek

Install

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.

agentmods

npx agentmods add skills/regenrek/codex-1up/debug-lldb

Any agent

npx skills add regenrek/codex-1up --skill debug-lldb

Clone the repo

git clone --depth 1 https://github.com/regenrek/codex-1up

Made for: Claude Code, Codex.

Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 503 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

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.

Model	Per session	Once invoked
Fable 5	$0.00065	$0.00503
Opus 5	$0.00032	$0.00251
Sonnet 5	$0.00013	$0.00101
Haiku 4.5	$0.00006	$0.00050

Measured 2d ago against content hash b70a42acc143, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

debug-lldb 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.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/collect_stacks.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

templates/skills/debug-lldb/SKILL.md · 54 lines

The source is not reproduced here

No licence file

Read it on GitHub

Files

What ships with it

2 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.

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.

2d ago First seen · 54 lines · 65 tokens per session scan A b70a42acc143

Subscribe to this mod's changes

debug-lldb is a skill published in the GitHub repository regenrek/codex-1up (436 stars, last pushed 6mo ago), with no licence file. It adds 65 tokens to every session and 503 once invoked, about $0.0003 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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