An Immune System
for a codebase of any scale

Confine analyses your code with context from every function it touches. Swarms the repo intelligently. Suggests the verified fix, not just the probable problem.

auth.c
- if (user_id == 0) return ERR_INVALID;
  token = generate_token(user_id);
  return token;
Confine Confine

Removing this check allows user_id == 0 (root) to generate tokens without validation. This was added in commit a3f2c to prevent privilege escalation.

Suggested fix: Keep the user_id validation check

How it works

1
Veni

You make a commit

Change any file in your repo. Confine sees the diff automatically.

2
Vidi

Confine loads context

It pulls cached contents of every function your changes interact with. Remembers the repo and its history.

3
Vici

You get a review

Delivers targeted comments. Not warnings — explanations. Not problems — fixes.

Why teams choose Confine

Learns your codebase

Confine builds a semantic memory of your code. It knows what functions do, not just what they're called.

Context, not just patterns

Static analyzers match patterns. AI agents stuff files into the context window. Confine understands.

Gets smarter over time

Every analysis builds the cache. After a month, Confine knows your code better than your docs.

Suggests the fix

Not "potential null pointer." Instead: "Add null check for user before line 42. Here's the code."

Pennies per PR

Incremental analysis means near-zero cost after warmup.

Works with C, Python, more

Built for systems code. Parses headers, tracks cross-file dependencies, understands modules.

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