Compile an API, an MCP server, a database or a web page into a CLI your agent can run. Ten engines, one output contract, 4.1x less context than raw MCP.
A compiler for the interface your agent already has: the shell. MCP makes an agent carry every tool's schema on every turn; declick compiles an API, an MCP server, or a database once into named verbs the model loads one at a time, and every verb returns one envelope with five exit codes. Ten engines, zero runtime dependencies, Node 24.
The saving is measured, not claimed: against nine real MCP servers (258 tools), the raw tool listing an MCP client puts in context is 236,818 bytes and declick describe is 58,309, a 4.1x reduction. node scripts/bench-tokens.mjs reproduces it on your own adapters; the method and the caveats are in docs/bench.md.
Requires Node 24 or newer. An older Node exits 1 with one line naming the version it found, from either entry point, instead of a stack trace.
declick setup puts ~/.declick/bin on PATH, adopts your agent's existing MCP servers as adapters, adds a rules block to its instruction file, and (Claude Code only) installs a hook that nudges the model toward the adapter; declick setup --revert puts everything back byte for byte.
The fifth line is a real call: petstore's user endpoints declare no auth, so the envelope comes back with the row. get-pet-by-id declares an API key in the spec, so without PETSTOREAPIKEY set it exits 4 and names the key; --dry-run shows the request it would send instead.
declick add writes three things: ~/.declick/petstore/manifest.json (the compiled surface), ~/.declick/bin/petstore (a two line launcher, with a petstore.cmd twin on Windows), and a petstore/SKILL.md in each agent skills directory it knows about, s
From the project README.
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