coding-observability

coding-observability is a skill for Claude Code, Codex from evoelsewhere/evoflux. It costs 91 tokens per session (911 once invoked), scanned A, original, Apache-2.0.

Use this skill to add or redesign logs, metrics, traces, or alerts for a code path — deciding what to instrument and why, structured-logging shape, correlation IDs, RED/USE signal selection, or alert thresholds. It requires naming the on-call question the telemetry answers before adding it; do not use it for…

Skill for Claude CodeCodex

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/evoelsewhere/evoflux/coding-observability
Any agent
npx skills add evoelsewhere/evoflux --skill coding-observability
Clone the repo
git clone --depth 1 https://github.com/evoelsewhere/evoflux

Made for: Claude Code, Codex.

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 coding-observability

README.md
[![agentmods](https://agentmods.dev/badge/skills/evoelsewhere/evoflux/coding-observability.svg)](https://agentmods.dev/skills/evoelsewhere/evoflux/coding-observability)
Your own site
<a href="https://agentmods.dev/skills/evoelsewhere/evoflux/coding-observability"><img src="https://agentmods.dev/badge/skills/evoelsewhere/evoflux/coding-observability.svg" alt="Measured on agentmods" height="20"></a>
Per session 91 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 911 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00091 $0.00911
Opus 5 $0.00046 $0.00456
Sonnet 5 $0.00018 $0.00182
Haiku 4.5 $0.00009 $0.00091

Measured today against content hash ec5c95986f18, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

coding-observability 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.

app/agent/builtin_skills/coding-observability/SKILL.md · 83 lines

How it starts

The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Instrument code for observability

Telemetry without a question behind it is noise, not signal: name what an operator would need to know before adding a log, metric, trace, or alert. Do not load bundled references when this skill activates.

Name the question first

  1. State two to four concrete on-call or debugging questions this telemetry must answer (e.g. "is this queue backing up," "which tenant is causing the error spike"). Reject an instrumentation request with no question behind it; ask what it is meant to diagnose.
  2. Choose the signal that answers each question: logs for what happened at a point in time, metrics for how often/how fast in aggregate, traces for where time went across a call chain. Do not default to logging everything.
  3. Read references/signal-selection.md for RED/USE selection, correlation-ID placement, cardinality limits, and alert design.

When the owning boundary for a signal is not yet an exact symbol, call code_context with action="search" once using the operation or error text. Skip search when the exact symbol is already known.

For an exact symbol being instrumented, use code_context to confirm its direct callers (who triggers it) and callees (what it depends on) so the correlation ID or span is attached at the actual request boundary, not an internal helper. Start at depth 1. Once the boundary is known, make the graph the next structural observation instead of continuing broad discovery.

Keep refresh=true for the first indexed query and after edits. Use refresh=false only for an immediate follow-up that intentionally reuses the same index version.

Read references/code-context-contract.md only after a result exposes ambiguity, cross-repository scope, or another static fallback gap.

Instrument

Use stable, named event identifiers rather than interpolated free-text messages so logs stay queryable as the message wording changes. Generate a correlation ID at the boundary that owns the request and propagate it through every downstream call and log line. Never attach a high-cardinality value — user ID, raw URL, request ID — as a metric label; put it in a log or trace instead, and keep metric labels bounded to a known, small set of values.

Read the full file on GitHub · 83 lines

Files

What ships with it

4 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.

  1. today First seen · 83 lines · 91 tokens per session scan A ec5c95986f18

Subscribe to this mod's changes

coding-observability is a skill published in the GitHub repository evoelsewhere/evoflux (7 stars, last pushed today), licensed Apache-2.0. It adds 91 tokens to every session and 911 once invoked, about $0.0005 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 2026-09-05.

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