killm

Temporarily block your machine from reaching LLM services, to curb AI dependency. Shamelessly written with AI.

npx killm for 1h --agents      # no coding agents for an hour
npx killm 30m --web            # no chat websites for 30 minutes
npx killm for 2h --all         # cut everything off for two hours

Run

npx killm for 1h --agents

Editing the hosts file needs elevated privileges:

• macOS / Linux: prefix with sudo → sudo npx killm for 1h --agents
• Windows: run from an Administrator terminal

Agents vs. Web

The whole point of killm is that an agentic coding tool and a chat website talk to different hostnames, so you can cut one without losing the other:

| Tool | Hostname | Scope | | --------------------------- | ------------------- | ---------- | | Claude Code, Aider, raw API | api.anthropic.com | --agents | | Claude chat website | claude.ai | --web | | OpenAI API, Codex | api.openai.com | --agents | | ChatGPT website | chatgpt.com | --web |

So:

• --agents blocks API endpoints and dedicated coding-assistant backends.
• --web blocks the consumer chat websites (claude.ai, chatgpt.com, gemini.google.com, perplexity.ai, etc).
• --all blocks both. This is the default if you don't pass a scope.

Usage

npx killm for <duration> [scope] [options]
npx killm <duration> [scope] [options]

The word for is optional sugar — killm for 1h --agents and killm 1h --agents are identical.

Duration

Combine units d / h / m / s:

90s    30m    1h    1h30m    2d

A bare number is treated as minutes (45 = 45m).

Scope

| Flag | Blocks | | ---------- | ---------------------------------------- | | --agents | Agentic coding tools + raw API endpoints | | --web | Consumer chat websites | | --all | Both (default) |

You can combine --agents and --web; that's the same as --all.

Options

| Option | Effect | | ----------------- | ------------------------------------------------ | | --firewall | Also block current IPs at the OS firewall | | --restore | Lift any active block right now and exit | | --status | Report whether a block is currently active | | --list | Print the hostnames a given scope would block | | --dry-run | Show what would change without touching anything | | -y, --yes | Skip the confirmation prompt | | -h, --help | Show help | | -v, --version | Show version |

Examples

npx killm for 1h --agents          # coding agents off for an hour
npx killm 30m --web                # chat websites off for 30 minutes
npx killm for 2h --all             # everything off for two hours
npx killm --list --agents          # see exactly what --agents blocks
npx killm for 25m --web --dry-run  # preview, change nothing
npx killm --restore                # end an active block early
npx killm --status                 # is a block running right now?

Firewall mode (--firewall)

The hosts file only intercepts name resolution, so a browser with Secure DNS enabled bypasses it. --firewall closes that hole: in addition to the hosts entries, killm resolves each target hostname to its current IPs and blocks those at the OS firewall:

sudo npx killm for 1h --web --firewall

• Linux: iptables / ip6tables OUTPUT rules, tagged with a killm comment
• Windows: one outbound Windows Firewall rule named killm (via netsh)
• macOS: a pf anchor named killm

Rules are removed together with the hosts block (timer, Ctrl+C, or killm --restore — which also sweeps up rules left behind by a crash, since they're all tagged).

License

MIT © Aidan Neel