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Dynamic Context Router for AI Coding Agents
A CLI tool and IDE plugin that automatically analyzes a developer's prompt and injects only the relevant custom instructions (skills) into the AI's context. This prevents context bloat, saves on token costs, and eliminates the need for manual skill toggling.
Why this matters
You are a developer heavily relying on AI agents to write code. Over time, you have built a library of markdown files dictating your preferred architecture, linting rules, and framework specifics. When you pass all of them into the agent, the token costs skyrocket and the AI gets confused by conflicting rules. Conversely, if you try to manage them manually, you waste precious time toggling checkboxes or copy-pasting snippets before every single prompt, completely breaking your flow.
- · Built for Power-user developers and indie hackers who frequently use API-based AI coding assistants and custom system prompts..
- · Most likely monetization: SaaS subscription.
The Pain · Narrative
You are a developer heavily relying on AI agents to write code. Over time, you have built a library of markdown files dictating your preferred architecture, linting rules, and framework specifics. When you pass all of them into the agent, the token costs skyrocket and the AI gets confused by conflicting rules. Conversely, if you try to manage them manually, you waste precious time toggling checkboxes or copy-pasting snippets before every single prompt, completely breaking your flow.
Score Breakdown
Market Signal
Go-to-Market
Senior software engineers using CLI-based AI coding agents who are highly sensitive to API token costs.
~100K active power users globally experimenting with advanced agent workflows.
Hacker News launch and developer-focused Twitter communities.
$12/month
50 active weekly users connecting the tool to their local AI agent workflows.
MVP Scope · 1–2 weeks
- Design a JSON schema for defining modular AI skills and constraints
- Build a local Node.js CLI that reads a directory of markdown skill files
- Implement a simple local vector store or keyword matcher for incoming prompts
- Create the routing logic to select the top 3 most relevant skills
- Write integration documentation for passing this context into standard CLI agents
- Implement a token counting utility to ensure the selected skills fit the budget
- Build a basic local UI or terminal dashboard to show which skills were injected
- Add an override flag for developers to manually force specific skills
- Package the CLI for easy installation via npm or Homebrew
- Draft a launch post demonstrating token cost savings with before-and-after metrics
Differentiation
Why This Might Fail
Self-rebuttal — the most important trust signal
- 1LLM context windows are becoming so large and cheap that routing might become unnecessary.
- 2Developers might find it easier to just use one massive system prompt and accept the minor hallucinations.
- 3Integrating smoothly as a middleman between the IDE and the AI provider could introduce latency that frustrates users.
Evidence Summary
How AI synthesized this insight — no verbatim quotes
Commenters expressed significant frustration with managing custom instruction files. Multiple users mentioned that large prompts consume the context budget and cause agents to eagerly apply irrelevant rules. Another user explicitly noted the time wasted manually toggling checkboxes to ensure only the right instructions are active for a given task.
Action Plan
Validate this opportunity before writing code
Recommended Next Step
Build
Strong demand signals detected. Real pain, real willingness to pay — start building an MVP.
Landing Page Copy Kit
Ready-to-paste copy based on real Reddit community language — no editing required
Headline
Dynamic Context Router for AI Coding Agents
Sub-headline
A CLI tool and IDE plugin that automatically analyzes a developer's prompt and injects only the relevant custom instructions (skills) into the AI's context. This prevents context bloat, saves on token costs, and eliminates the need for manual skill toggling.
Who It's For
For Power-user developers and indie hackers who frequently use API-based AI coding assistants and custom system prompts.
Feature List
✓ Semantic matching of user prompts to specific markdown skill files ✓ Automatic token-budget calculator and optimizer ✓ Integration with Model Context Protocol (MCP)
Where to Validate
Share your landing page in r/HN · front_page — that's exactly where these pain points were discovered.
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