Happier is an open-source, end-to-end encrypted client that lets people run AI coding-agent sessions on a computer and continue controlling them from a phone, browser, or desktop app. It is for developers who use agents such as Claude Code, Codex, Gemini, or OpenCode across multiple devices, with self-hosting available. The catalogue entries are add-ons for configuring or extending this client and its supported coding-agent workflows.
Borrowing it
Nothing to install: this file belongs to happier-dev/happier. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/happier-dev/happier/dev/.agents/skills/happier-issue-diagnose/SKILL.mdgit clone --depth 1 https://github.com/happier-dev/happierWrote 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.
[](https://agentmods.dev/skills/happier-dev/happier/happier-issue-diagnose)<a href="https://agentmods.dev/skills/happier-dev/happier/happier-issue-diagnose"><img src="https://agentmods.dev/badge/skills/happier-dev/happier/happier-issue-diagnose/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.
<a href="https://agentmods.dev/skills/happier-dev/happier/happier-issue-diagnose"><img src="https://agentmods.dev/badge/skills/happier-dev/happier/happier-issue-diagnose.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00089 | $0.03453 |
| Opus 5.5 | $0.00036 | $0.01381 |
| Sonnet 5.5 | $0.00018 | $0.00691 |
| Haiku 4.5 | $0.00009 | $0.00345 |
Grade A, and why
happier-issue-diagnose 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 17d 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.
How it starts
The opening of the file, as written. The whole thing — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Happier Issue Diagnose
Establish what is true about one coherent GitHub issue bundle, where the behavior originates, which versions are affected, and what response is justified. Treat the bundle relationship and every reporter-supplied diagnosis as hypotheses until evidence supports them.
This skill owns the GitHub-issue diagnosis contract. It composes existing engineering doctrine instead of copying it:
- use
.agents/skills/verify-claimsfirst for pre-diagnosed engineering reports or delegated conclusions; - use
.agents/skills/happier-diagnoseand its evidence references for runtime, daemon, session, provider, authentication, or connectivity incidents; - use
.agents/skills/happier-compatibilityfor component skew, released behavior, installed artifacts, persistence, upgrades, or rollback; - use
.agents/skills/happier-testingfor controlled reproduction and deciding validation; - use
.agents/skills/happier-reviewin advisory/report mode to assess a linked pull request against the independently verified issue contract and affected corridor; - use
.agents/skills/happier-release*for packaging, signing, publication, promotion, or released-artifact defects; - use
.agents/skills/happier-implementonly after the user authorizes source changes; - when diagnosing from the 0.2 line, assess whether the same contract or defect mechanism is reachable in 0.3 and pass that evidence to
.agents/skills/happier-port-0-2-to-0-3after the 0.2 correction is validated.
Working stance
Use docs/agent-craft.md and .agents/skills/handoff-report for the canonical working and communication method. Speak to the primary maintainer as a trusted engineering partner: lead with your own evidence-backed judgment, challenge the issue's framing when warranted, explain the causal story, and select the detail needed for the next decision. Do not expose the investigation's checklists as the shape of the answer.
After the required initial skill announcement, send commentary when a discovery changes the hypothesis, bundle, confidence, blocker, or next action. Do not narrate routine reference loading, source searches, dirty-worktree administration, or workflow compliance unless it materially affects the conclusion.
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.
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.
- 17d ago Changed · +2 lines 7ce6c77cc2e3
- 1mo ago Changed 5fe15f24eba3
- 1mo ago Changed c16446fc8a48
- 1mo ago First seen · 155 lines · 89 tokens per session scan A a99d774af3c7
happier-issue-diagnose is a skill published in the GitHub repository happier-dev/happier (2,072 stars, last pushed yesterday), licensed MIT. It adds 89 tokens to every session and 3,453 once invoked, about $0.0004 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 2026-09-03.
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