A toolkit for examining startup ideas and finding product opportunities in Hacker News discussions. It scores an idea across multiple factors, records assumptions, compares evaluations, and suggests ways to change an idea.

It helps evaluate, compare, and improve startup ideas, and investigate technology changes or user problems discussed on Hacker News.

It gives founders a structured second opinion before they spend time and money building a product.

tweakidea — Skill for Claude Code by eph5xx

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 eph5xx/tweakidea --skill tweakidea

Clone the repo

git clone --depth 1 https://github.com/eph5xx/tweakidea

Made for: Claude Code.

Or install tweakidea, the plugin that ships this one along with the rest of its 1 skill, 8 commands.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/eph5xx/tweakidea/tweakidea/github.svg)](https://agentmods.dev/skills/eph5xx/tweakidea/tweakidea)

Your own site

<a href="https://agentmods.dev/skills/eph5xx/tweakidea/tweakidea"><img src="https://agentmods.dev/badge/skills/eph5xx/tweakidea/tweakidea/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/eph5xx/tweakidea/tweakidea"><img src="https://agentmods.dev/badge/skills/eph5xx/tweakidea/tweakidea.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 80 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,760 The whole file, excluding the scripts and references it only reads on demand.

Security scan C 2 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.

Model	Per session	Once invoked
Fable 5.1	$0.00080	$0.01760
Opus 5.5	$0.00032	$0.00704
Sonnet 5.5	$0.00016	$0.00352
Haiku 4.5	$0.00008	$0.00176

Measured 2d ago against content hash eec330c63c61, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

tweakidea scanned grade C with 2 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 2d ago.

The scan reads SKILL.md. This mod also ships 8 executable files (scripts/compute.py, scripts/hnparse.py, scripts/hnsearch.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

4. Python helpers in `{SKILL_DIR}/scripts/` run through `uv run`. If a command needs them and `uv` is missing, tell the user to install it (`brew install uv` or `curl -LsSf https://astral.sh/uv/install.sh | sh`) and stop

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

4. Python helpers in `{SKILL_DIR}/scripts/` run through `uv run`. If a command needs them and `uv` is missing, tell the user to install it (`brew install uv` or `curl -LsSf https://astral.sh/uv/install.sh | sh`) and stop

skills/tweakidea/SKILL.md · 80 lines

How it starts

The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.

TweakIdea helps founders make better decisions: evaluate whether a problem is worth solving, or discover which problems are emerging from technology shifts. Be an honest second opinion, not a cheerleader.

Setup

SKILL_DIR is the directory that contains this SKILL.md (the runtime reports it as the skill's base directory). If no base directory is reported, use the first of $(pwd)/.claude/skills/tweakidea, $HOME/.claude/skills/tweakidea, $(pwd)/.agents/skills/tweakidea, or $HOME/.agents/skills/tweakidea that contains SKILL.md. Every {SKILL_DIR} path in this skill and its references resolves against it.
Runtime: read references/runtime.md and map each capability it lists (ask-user, spawn-subagent, web-search, read-file, and the rest) and each model tier to what your runtime provides. The references name capabilities, not tools.
HOME_DIR is the output of echo "$HOME". All user data lives under {HOME_DIR}/.tweakidea/.
Python helpers in {SKILL_DIR}/scripts/ run through uv run. If a command needs them and uv is missing, tell the user to install it (brew install uv or curl -LsSf https://astral.sh/uv/install.sh | sh) and stop.

Routing

The invocation arguments are:

$ARGUMENTS

If the line above is still an unsubstituted placeholder (a dollar sign followed by the word ARGUMENTS), your runtime does not substitute arguments: use the text after the skill name in the user's invoking message instead.

Split them into COMMAND (the first word) and ARGS (everything after it). Command references use ARGS wherever they need the user's input.

No arguments: show the Commands table below and ask which command to run (ask-user with evaluate, improve, browse-hn, list; free text covers the rest). Never auto-run a command.
First word is a command name: read that command's reference and follow it exactly, with ARGS as its input.
Anything else: treat the full argument text as an idea and run evaluate with it as ARGS.

Read the full file on GitHub · 80 lines

Files

What ships with it

52 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.

2d ago First seen · 80 lines · 80 tokens per session scan C eec330c63c61

Subscribe to this mod's changes

tweakidea is a skill published in the GitHub repository eph5xx/tweakidea (55 stars, last pushed yesterday), licensed MIT. It adds 80 tokens to every session and 1,760 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-26.

Claude Code Planning Research competitor-analysis founder-tools hacker-news idea startup

gr-competitor

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tweakidea

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade C, and why

Downloads and executes remote codehighSupply chain

Makes network callslowCapability

How it starts

Setup

Routing

What ships with it

What this file has done since we first saw it

Other skills, from other repositories

gr-competitor

idea-validator

idea-to-mvp

venture-architect

pmf-advisor

idea-validator