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-port-0-2-to-0-3/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-port-0-2-to-0-3)<a href="https://agentmods.dev/skills/happier-dev/happier/happier-port-0-2-to-0-3"><img src="https://agentmods.dev/badge/skills/happier-dev/happier/happier-port-0-2-to-0-3/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-port-0-2-to-0-3"><img src="https://agentmods.dev/badge/skills/happier-dev/happier/happier-port-0-2-to-0-3.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 | $0.00111 | $0.01126 |
| Opus 5.5 | $0.00044 | $0.00450 |
| Sonnet 5.5 | $0.00022 | $0.00225 |
| Haiku 4.5 | $0.00011 | $0.00113 |
Grade A, and why
happier-port-0-2-to-0-3 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 1mo 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 — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Happier Port 0.2 to 0.3
Own the forward-port lifecycle from the 0.2 release line to the 0.3 development line. Treat checkout paths as runtime inputs, never as product or release identities.
1. Load the owning workflows
Use:
.agents/skills/happier-compatibilityfor released and prospective wire, persistence, semantic, and operational contracts;.agents/skills/happier-implementand.agents/skills/happier-testingfor destination changes and RED -> GREEN proof;.agents/skills/verify-claimsbefore relying on source reports or delegated conclusions;.agents/skills/attack-conclusionand.agents/skills/handoff-reportfor closeout.
Read port-workflow.md before acting.
2. Resolve source and destination explicitly
Obtain or discover two independent Git checkouts:
- the 0.2 source line containing the complete validated change;
- the 0.3 destination line that must preserve its intent.
Prefer an explicit destination supplied by the user or calling workflow. Otherwise, try the optional sibling alias ../v0.3.x, then verify that it is a Git checkout for the intended Happier repository before using it. If the alias is absent or resolves incorrectly, ask for the destination location; do not create or repair filesystem aliases implicitly.
Verify repository identity, branch/commit basis, dirty state, and current bytes. Do not infer a release line from a directory name, assume a sibling path exists, create or clone a checkout without authorization, or switch a primary checkout. If the destination is unavailable, continue source-side analysis and report only the port as blocked with the exact missing location or authority.
3. Establish the validated source basis
Port after the source change forms a coherent batch and passes its required validation. Read the current in-scope source bytes, record their basis for this port pass, and express every change independently of filenames:
- user-visible or operational outcome;
- defect mechanism or invariant;
- canonical source owner and affected callers/readers/writers;
- tests and compatibility behavior that prove it;
- exclusions and intentionally unchanged behavior.
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.
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.
- 1mo ago Changed 84a35873b93c
- 1mo ago First seen · 74 lines · 111 tokens per session scan A e12ac0fb374b
happier-port-0-2-to-0-3 is a skill published in the GitHub repository happier-dev/happier (2,072 stars, last pushed yesterday), licensed MIT. It adds 111 tokens to every session and 1,126 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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