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Example code of hop-top/c12n

Informations about the package c12n

c12n-php

LLM request classification engine — PHP FFI bindings over the Rust core.

Status

Alpha — initial scaffold. The FFI surface is wired against the cbindgen-generated header in c12n-core/include/libc12n_core.h; the native libc12n_core.{so,dylib,dll} is downloaded by the post-install script (T-0143, not yet implemented). For local development, build the cdylib from c12n-core/ and either symlink it into runtime/lib/ or set C12N_CORE_LIB_PATH.

Requirements

Install

The post-install-cmd hook (registered now, implemented in T-0143) fetches the matching libc12n_core tarball from https://github.com/hop-top/c12n/releases/download/{tag}/..., SHA256-verifies it, and extracts into vendor/hop-top/c12n/runtime/lib/.

Quick start

Native library resolution

HopTop\C12n\Ffi::libPath() resolves the path to libc12n_core in this order (ADR-0002 §4):

  1. C12N_CORE_LIB_PATH env var — explicit override for airgapped / sandboxed installs.
  2. composer.json#extra.c12n-core.local-path — project-local override, useful when developing against a sibling cdylib checkout.
  3. Default: runtime/lib/libc12n_core.{so,dylib,dll} relative to this package, populated by the post-install Installer.

Header contract

HopTop\C12n\Ffi::CDEF mirrors the four public symbols emitted by c12n-core/include/libc12n_core.h:

PHP's FFI parser does not understand the C preprocessor (`#include

`, `#ifdef`, etc.), so the cbindgen header is **not** fed directly to `FFI::cdef`. Instead the four prototypes are inlined as a string constant. Any change to the FFI surface in `c12n-core/src/ffi.rs` that affects the four symbols above requires updating `Ffi::CDEF`. ## Development ### FFI integration suite `tests/PipelineFfiIntegrationTest.php` exercises the full roundtrip against the real `libc12n_core` cdylib. The suite skips automatically when the cdylib is not on disk, so `composer test` stays green on fresh clones. To run it end-to-end: If `C12N_CORE_LIB_PATH` is unset, the suite resolves the cdylib at `/target/debug/libc12n_core.{dylib,so,dll}` relative to this package — the same path `cargo build -p hop-top-c12n-core` populates from the workspace root. ## Troubleshooting | Symptom | Fix | |----------------------------------------------------------|-----| | `FFI is not enabled` | Add `ffi.enable=true` to `php.ini`. | | `c12n: native library not found at ...` | Run `composer install` to trigger the post-install download, or set `C12N_CORE_LIB_PATH=/abs/path/libc12n_core.dylib`. | | `c12n: c12n_pipeline_new returned null` | Malformed config JSON or tokio runtime init failure. Check `maxConcurrency` is positive and `timeoutMs` fits in `u64`. | | `c12n: pipeline is closed` | The pipeline was explicitly closed (or `__destruct`ed) before `evaluate()`. Construct a fresh `Pipeline`. | | `c12n: ` (from `evaluate`) | The Rust core returned a JSON error envelope. The message is the verbatim string from `c12n_pipeline_evaluate`. | ## References - ADR-0002 — `docs/adr/0002-c12n-php-ffi-binding.md` — locked decisions. - `c12n-core/include/libc12n_core.h` — cbindgen output (source of truth for the FFI surface). - `c12n_cgo.go` / `c12n-py/src/lib.rs` — reference bindings whose API surface c12n-php mirrors.

All versions of c12n with dependencies

PHP Build Version
Package Version
Requires php Version ^8.4
ext-ffi Version *
hop-top/kit Version ^0.5
Composer command for our command line client (download client) This client runs in each environment. You don't need a specific PHP version etc. The first 20 API calls are free. Standard composer command

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