Pico

v0.2.0 Breaking

This release includes 1 breaking change for platform teams planning a safe upgrade.

Published 15d Editors & IDEs

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✓ No known CVEs patched

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✓ No known CVEs patched in this version

Topics

bytecode-vm c compiler compiler-design embeddable embeddable-scripting-language

+6 more

interpreter language programming-language register-vm scripting-language virtual-machine

ReleasePort's take

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editorial:auto 12d

Pico v0.2.0 introduces a comprehensive public C embedding API and associated VM lifecycle, evaluation, native function registration, error handling, and callback features.

Why it matters: The new C embedding API (severity 40) enables direct integration of the PiCo runtime into host applications, providing control over script execution, error reporting, and native‑function interop for developers building embedded systems.

Summary

AI summary

Added a public C embedding API with VM lifecycle, evaluation, native function registration, and error handling.

Changes in this release

Type	Severity	Summary	CVE
Feature
Feature	Medium	Adds public C embedding API in `pico.h` Adds public C embedding API in `pico.h` Source: llm_adapter@2026-07-15 Confidence: high	—
Feature	Medium	Adds embeddable runtime library target `libpico.a` Adds embeddable runtime library target `libpico.a` Source: llm_adapter@2026-07-15 Confidence: high	—
Feature	Medium	Adds VM lifecycle APIs: `pico_vm_create()` and `pico_vm_destroy()` Adds VM lifecycle APIs: `pico_vm_create()` and `pico_vm_destroy()` Source: llm_adapter@2026-07-15 Confidence: high	—
Feature	Medium	Adds source evaluation from C via `pico_vm_eval()` Adds source evaluation from C via `pico_vm_eval()` Source: llm_adapter@2026-07-15 Confidence: high	—
Feature	Medium	Adds C-to-PiCo function calls with `pico_vm_call()` Adds C-to-PiCo function calls with `pico_vm_call()` Source: llm_adapter@2026-07-15 Confidence: high	—
Feature	Medium	Adds PiCo-to-C native function registration via `pico_vm_register_native()` Adds PiCo-to-C native function registration via `pico_vm_register_native()` Source: llm_adapter@2026-07-15 Confidence: high	—
Feature	Medium	Adds public value helpers for null, bool, and number types Adds public value helpers for null, bool, and number types Source: llm_adapter@2026-07-15 Confidence: high	—
Feature	Medium	Adds runtime error access via `pico_vm_last_error()` Adds runtime error access via `pico_vm_last_error()` Source: llm_adapter@2026-07-15 Confidence: high	—
Feature	Medium	Adds output and error callbacks: `pico_vm_set_output()` and `pico_vm_set_error_output()` Adds output and error callbacks: `pico_vm_set_output()` and `pico_vm_set_error_output()` Source: llm_adapter@2026-07-15 Confidence: high	—
Feature	Low	Adds install support for binary `pico`, header `pico.h`, library `libpico.a`, documentation, and examples Adds install support for binary `pico`, header `pico.h`, library `libpico.a`, documentation, and examples Source: granite4.1:30b@2026-07-15-audit Confidence: low	—
Bugfix	Medium	Prevents embedded scripts from terminating host process via `os.exit()` Prevents embedded scripts from terminating host process via `os.exit()` Source: llm_adapter@2026-07-15 Confidence: high	—

Full changelog

Host programs can now create a PiCo VM, evaluate PiCo source code, register native C functions, call PiCo functions from C, capture script output, and read runtime errors.

Highlights

Added public C embedding API in pico.h
Added embeddable runtime library target libpico.a
Added VM lifecycle APIs:
- pico_vm_create()
- pico_vm_destroy()
Added source evaluation from C:
- pico_vm_eval()
Added C-to-PiCo function calls:
- pico_vm_call()
Added PiCo-to-C native function registration:
- pico_vm_register_native()
Added public value helpers for:
- null
- bool
- number
Added runtime error access:
- pico_vm_last_error()
Added output and error callbacks:
- pico_vm_set_output()
- pico_vm_set_error_output()
Embedded scripts can no longer terminate the host process through os.exit()
Added embedding examples
Added an external CMake example for linking against an installed PiCo runtime
Added install support for:
- pico
- pico.h
- libpico.a
- documentation
- examples

The public value API is intentionally small in this release. It currently supports null, bool, and number.

Breaking Changes

os.exit() can no longer terminate the host process

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