A guide for finding recent errors in a Lensflare dataset, a collection of monitoring records, and summarising their underlying cause.

It helps investigate what is broken, group recurring errors, inspect related traces, and report the most common failure.

It turns scattered error records or an unclear stack trace into the main failure, affected service, and first failing operation.

find-error — Skill for Claude Code by voidhashcom/lensflare

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.

Any agent

npx skills add voidhashcom/lensflare --skill find-error

Clone the repo

git clone --depth 1 https://github.com/voidhashcom/lensflare

Made for: Claude Code.

Or install lensflare-desktop, the plugin that ships this one along with the rest of its 3 skills.

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/skills/voidhashcom/lensflare/find-error/github.svg)](https://agentmods.dev/skills/voidhashcom/lensflare/find-error)

Your own site

<a href="https://agentmods.dev/skills/voidhashcom/lensflare/find-error"><img src="https://agentmods.dev/badge/skills/voidhashcom/lensflare/find-error/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/skills/voidhashcom/lensflare/find-error"><img src="https://agentmods.dev/badge/skills/voidhashcom/lensflare/find-error.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 353 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	$0.00052	$0.00353
Opus 5.5	$0.00021	$0.00141
Sonnet 5.5	$0.00010	$0.00071
Haiku 4.5	$0.00005	$0.00035

Measured 2mo ago against content hash a6a73b5cb66f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

find-error 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.

plugins/lensflare-desktop/skills/find-error/SKILL.md · 17 lines

What it actually says

Find an error in Lensflare

You have access to the Lensflare MCP server (lensflare).

Call lensflare:listDatasets if the user has not specified one. If exactly one dataset exists, use it. Otherwise, ask the user which to query.
Call lensflare:queryTelemetry with query: 'level in ["error", "fatal"] or status = "error"'. Use limit: 50 unless the user asked for more.
Group the returned records by name (for spans) or message (for logs) to find the dominant failure mode.
For the most frequent error, if it has a traceId, call lensflare:getTrace and read summary.erroredSpans to identify the failing span.
Report: the error class, frequency, the failing service, and the first failing span. Include the traceId so the user can open the trace in the desktop app.

Query language reminder. Use ~= for regex, contains for substring, and quote string values. Boolean operators are and / or / not. Top-level fields include level, status, serviceName, traceId, durationUs. Attributes use attributes.<key> (or attr.<key>). The full grammar is in the queryTelemetry tool description.

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 · 17 lines · 52 tokens per session scan A a6a73b5cb66f

Subscribe to this mod's changes

find-error is a skill published in the GitHub repository voidhashcom/lensflare (100 stars, last pushed 4mo ago), licensed MIT. It adds 52 tokens to every session and 353 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.

Analytics and metrics Debugging

find-error next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
find-errorvoidhashcom/lensflare	Skill	100	4mo ago	MIT	A	52	Claude Code
systematic-debuggingopen-metadata/OpenMetadata	Skill	16k	yesterday	Apache-2.0	A	37	Claude Code
log-error-digestzebbern/claude-code-guide	Skill	4.7k	3d ago	MIT	A	71	Claude Code, Codex
cwv-optimizeradobe/skills	Skill	319	yesterday	Apache-2.0	A	112	Claude Code
ci-fixersipyourdrink-ltd/bernstein	Skill	1.2k	yesterday	Apache-2.0	A	15	Claude Code, Codex
incident-response-incident-responsermyndharis/antigravity-skills	Skill	1.9k	23d ago	MIT	A	36	Claude Code
triaging-web-analytics-supportPostHog/posthog	Skill	41k	yesterday	none	A	151	Claude Code, Codex