httpx-plan

httpx-plan is a skill for Claude Code from steph-dove/klaussy-agents. It costs 50 tokens per session (3,450 once invoked), scanned A, a copy of fastapi-plan, MIT.

A multi-phase workflow for planning and implementing a substantial coding task in a repository. It covers discovery, questions, architecture choices, approval, implementation, review, and a written plan.

In plain words
What is it for?
Use it to investigate a non-trivial repository task, compare implementation approaches, get an approval gate, carry out the chosen plan, and review the result.
Why use it?
It gives complex work a documented structure and checkpoints before code changes are made.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions CLAUDE.md; mentions subagents; names the ExitPlanMode tool.

Part of the klaussy plugin — 79 skills, 3 hooks, 1 MCP server shipped together

Good fit Use it to investigate a non-trivial repository task, compare implementation approaches, get an approval gate, carry out the chosen plan, and review the result.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/steph-dove/klaussy-agents/httpx-plan
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 steph-dove/klaussy-agents --skill httpx-plan
Clone the repo
git clone --depth 1 https://github.com/steph-dove/klaussy-agents

Made for: Claude Code.

Or install klaussy, the plugin that ships this one along with the rest of its 79 skills, 3 hooks, 1 MCP server.

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 httpx-plan

README.md
[![agentmods](https://agentmods.dev/badge/skills/steph-dove/klaussy-agents/httpx-plan/github.svg)](https://agentmods.dev/skills/steph-dove/klaussy-agents/httpx-plan)
Your own site
<a href="https://agentmods.dev/skills/steph-dove/klaussy-agents/httpx-plan"><img src="https://agentmods.dev/badge/skills/steph-dove/klaussy-agents/httpx-plan/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 httpx-plan

Your own site · 80×15
<a href="https://agentmods.dev/skills/steph-dove/klaussy-agents/httpx-plan"><img src="https://agentmods.dev/badge/skills/steph-dove/klaussy-agents/httpx-plan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,450 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 100% copy Near-identical to another mod 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 $0.00050 $0.03450
Opus 5 $0.00025 $0.01725
Sonnet 5 $0.00010 $0.00690
Haiku 4.5 $0.00005 $0.00345

Measured 11d ago against content hash 6cfc9403430a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

httpx-plan 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 11d 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.

Origin

This is a copy

100% identical to fastapi-plan — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

examples/httpx/.agents/skills/httpx-plan/SKILL.md · 179 lines

How it starts

The opening of the file, as written. The whole thing — 179 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Adapted for Cline.

  • This skill orchestrates parallel sub-agents using Claude's Agent tool / subagent_type syntax. Most coding agents now have their own parallel sub-agent or task mechanism (e.g. Cursor's Task, Codex's spawn_agent, Gemini subagents, Copilot's task) — use yours and translate the wording. If it truly has none, apply each lens or angle yourself, sequentially, and combine the findings.
  • Where it references "plan mode" or ExitPlanMode, use your agent's own plan/approval mode if it has one; otherwise present your plan and wait for explicit approval before editing any files.

You are helping plan and implement a task in this repo. Follow these phases in order — do NOT skip Phase 3 (clarifying questions).

Output file: the approved plan is written to plan.md at the repo root. Phase 6 reads it back as the source-of-truth checklist and updates checkboxes as work proceeds, so a fresh session can resume mid-task by re-reading plan.md. The file is gitignored.

Use TodoWrite throughout: create one task per phase up front, mark each in_progress when starting and completed when done. The flow is long-running, and the todo list keeps the user oriented.

Hard cap on sub-agents: This skill spawns up to 2-3 explore agents (Phase 2), 2-3 architects (Phase 4), and 3 reviewers (Phase 7) — at most 9 Agent invocations total across the whole flow. Do NOT exceed that cap. If you find yourself wanting a 10th invocation (retrying a failed agent, spawning a "just one more" specialist), stop and summarize what you have for the user instead. Retries hide failures; extra specialists are scope creep.

Phase 1 — Discovery

Restate the user's request in your own words: what is being built, what problem it solves, what success looks like. Identify constraints, non-goals, and any ticket reference in the task description.

Surface-level ambiguity check — before launching parallel exploration in Phase 2 (which costs 2-3 agent invocations), make sure you can answer all of these:

  • Can you name the thing being built in one sentence (a feature, a fix, a refactor)?
  • Do you know the user-visible surface it touches (an endpoint, a screen, a command)?
  • Is success observable (a behavior change you could write a test for)?

If any answer is "no", ask the user before exploring. Phase 3 covers the deeper "what should error handling do" / "what about edge case X" questions; Phase 1 catches the "do I even know what they want" case so the parallel agents don't waste effort on the wrong target.

Referenced-asset check — block, don't invent. If the task or ticket points at material you need but cannot actually retrieve — a mockup, screenshot, or design file attached to a GitHub/Jira issue; a Figma link; an image, spec, or doc you have no tool to open — do NOT proceed by guessing what it contains. gh issue view shows an issue's text but does not download its image attachments, and a design you can't see is not a design you can fabricate. Stop and tell the user exactly which assets you're missing and ask them to provide them (paste the image, drop the file into the repo, share the copy/measurements). Never make up UI text, layout, spacing, colors, or copy to fill the gap — a plausible-looking invention is worse than a blocked task, because it looks done. This is a hard block: planning cannot continue past a design the human hasn't given you.

Confirm with the user before continuing.

Read the full file on GitHub · 179 lines

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. 11d ago First seen · 179 lines · 50 tokens per session scan A 6cfc9403430a

Subscribe to this mod's changes

httpx-plan is a skill published in the GitHub repository steph-dove/klaussy-agents (16 stars, last pushed 14d ago), licensed MIT. It adds 50 tokens to every session and 3,450 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to fastapi-plan, differing in 2 lines, and is treated as a copy.