wdym

wdym is a skill for Claude Code from sxhmilyoyo/sundayhao-plugins. It costs 175 tokens per session (1,116 once invoked), scanned A, original, Apache-2.0.

A session explainer that rewrites an agent's conclusions, logs, diffs, errors, query results, or reports in clearer language. It bases the explanation on what actually happened in the current session.

In plain words
What is it for?
Use it after agent work to understand a decision, tool result, error, code change, or subagent report.
Why use it?
It helps when an agent's output is difficult to follow or you want to verify what the evidence means. It explains the concrete files, commands, and results rather than giving a generic definition.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: mentions subagents.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the second-brain plugin — 6 skills, 3 hooks shipped together

Good fit Use it after agent work to understand a decision, tool result, error, code change, or subagent report.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add sxhmilyoyo/sundayhao-plugins
Claude Code
/plugin install second-brain

Made for: Claude Code.

Or install second-brain, the plugin that ships this one along with the rest of its 6 skills, 3 hooks.

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 wdym

README.md
[![agentmods](https://agentmods.dev/badge/skills/sxhmilyoyo/sundayhao-plugins/wdym/github.svg)](https://agentmods.dev/skills/sxhmilyoyo/sundayhao-plugins/wdym)
Your own site
<a href="https://agentmods.dev/skills/sxhmilyoyo/sundayhao-plugins/wdym"><img src="https://agentmods.dev/badge/skills/sxhmilyoyo/sundayhao-plugins/wdym/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.

agentmods 80×15 button for wdym

Your own site · 80×15
<a href="https://agentmods.dev/skills/sxhmilyoyo/sundayhao-plugins/wdym"><img src="https://agentmods.dev/badge/skills/sxhmilyoyo/sundayhao-plugins/wdym.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 175 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,116 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00175 $0.01116
Opus 5.5 $0.00070 $0.00446
Sonnet 5.5 $0.00035 $0.00223
Haiku 4.5 $0.00017 $0.00112

Measured 8d ago against content hash f0ff22105a10, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

wdym 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 8d 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.

second-brain/skills/wdym/SKILL.md · 98 lines

How it starts

The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.

WDYM — What Do You Mean

Re-explain a stretch of this session's agent work to the person supervising it. The source material is the session itself: explain what actually happened here, never the general case.

Step 0: Load the profile

source "${CLAUDE_PLUGIN_ROOT}/skills/common/get_kb_path.sh" && KB_PATH=$(get_kb_path)
cat "$KB_PATH/rules/comprehension-profile.md"

The profile carries the person's calibration that is not already in their always-on instructions — register, analogy policy, native formats, daily-stack anchors, known confusion clusters — and overrides the generic defaults below. If the file is missing, use the defaults and offer once to compile a profile from the knowledge bank's reflections.

Calibration (generic defaults; the profile overrides)

  • Peer register for a working engineer. Never a child's register.
  • Prose at "80% of the way to ASD-STE100": short sentences, active voice, one term per concept, one idea per sentence. Soften rather than follow the spec strictly — strict STE measurably drops facts.
  • One brief analogy may open; the in-context example is mandatory: the actual file, log line, or command from this session. An analogy without the in-context example is a non-answer.
  • Anything with layers, roles, or directions gets a 2-axis table or a decision tree, not prose.
  • Close substantial explanations with a trigger list: "you'll know X applies when …".

The ladder

Follow-ups escalate predictably. Answer the rungs that apply, and never leave the NEXT rung unaddressed — it is the question you will be asked anyway:

  1. What changed?
  2. Where does it come from? (file, config, upstream system)
  3. What is X? (term, acronym — define once, use it consistently after)
  4. Why this way? (the alternative considered, and why not)
  5. Prove it. (the verification evidence)

Format escalation

Start at rung 1; climb only while the point is not landing:

  1. Prose — 80%-STE, calibrated as above.
  2. Diagram — when the subject has layers, roles, directions, or flow. After drawing, restate every edge as a checkable sentence; a missing arrow silently claims "no dependency".
  3. Interactive HTML — one focused page, only when a static diagram cannot carry it (state spaces, before/after comparisons, things worth poking at). Reuse the show-me grammar.

Read the full file on GitHub · 98 lines

Files

What ships with it

1 file 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. 8d ago Changed · +1 lines f0ff22105a10
  2. 12d ago First seen · 97 lines · 175 tokens per session scan A e20e9578a9c4

Subscribe to this mod's changes

wdym is a skill published in the GitHub repository sxhmilyoyo/sundayhao-plugins (8 stars, last pushed 4d ago), licensed Apache-2.0. It adds 175 tokens to every session and 1,116 once invoked, about $0.0007 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 2026-10-07.

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