docs/20 builds the engine and the boundary: the startup order, the starfield, actors and collision, booting a DEF-only script, the issue #8 mode workaround, the custom update hook, first light, screens, and the headless harness. docs/21 builds the three shared structures and the AI: the host type tables, the actor binding, the randomness route around issue #16, the measured case against structure arguments (issue #36), the three language rules that shape the script, the maneuvers, the argued formation decision, the script-death policy, and the interop proof. Every fenced block runs under tests/docs_examples.sh in both build configurations; five new preludes carry the C fragments. docs/10 gains the 'Calling a function every frame' section the chapters lean on: the per-call akbasic_environment_zero() rule, the set_mode(RUN) workaround, the clear_error() revival, and the case for rebinding over structure arguments. Index rows and chapter counts updated. Co-authored-by: andrew <andrew@aklabs.net> Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XiGgpHuXUm2mR4Wzndw3dc
71 lines
5.0 KiB
Markdown
71 lines
5.0 KiB
Markdown
# CLAUDE.md
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This file provides guidance to Claude Code (claude.ai/code) when working with code in this
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repository.
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## Read MAINTENANCE.md first
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**[`MAINTENANCE.md`](MAINTENANCE.md) is the authoritative document for changing this project**,
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and it is written for whoever has to do the changing — human or agent. It carries what used to
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live in this file: the project goals, the Go reference implementation and its architecture, the
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dependency versions and their ABI rules, the four ways an embedded build collides, the
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`libakerror` error convention, the coordinated error-code range map, the test lists, the
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documentation-example harness, and the style and commit rules.
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There is one copy of all of that, on purpose. Anything you would have added here, add there
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instead — the maintainer needs it as much as you do, and a second copy is a second thing to
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keep true.
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`akbasic` is a C rewrite of the Go BASIC interpreter in `deps/basicinterpret`, written in the
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idiom of the `ak*` C libraries it builds on, and meant to end up embedded in `libakgl` as a
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scripting engine for game authors.
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| Read | For |
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| [`MAINTENANCE.md`](MAINTENANCE.md) | Everything above. Start here |
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| [the issue tracker](https://source.starfort.tech/andrew/akbasic/issues) | **Outstanding defects and gaps.** Labelled by kind and blast radius; `status::grooming` means the scope is not settled yet |
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| [`TODO.md`](TODO.md) | The record: settled design decisions, the deviation register, defects already fixed, and the reasoning behind the measurements. §0.1 first — it retires the byte-for-byte fidelity constraint several later sections were written on |
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| [`README.md`](README.md) | What the project is and why, for somebody who has not seen it |
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| [`docs/`](docs/README.md) | The language itself: twenty-one chapters, verb and function reference. [Chapter 14](docs/14-architecture.md) is the interpreter's architecture — the step loop, the pools, the two kinds of error, and how to debug it. [Chapter 15](docs/15-error-codes.md) is the error-code appendix. [Chapters 17](docs/17-tutorial-breakout.md) and [18](docs/18-tutorial-breakout-artwork.md) are tutorials that build the games in `examples/breakout/`; [Chapters 20](docs/20-tutorial-galaga.md) and [21](docs/21-tutorial-galaga-enemies.md) build the embedding host in `examples/galaga/` |
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| `deps/libakerror/AGENTS.md` | The `ATTEMPT`/`CLEANUP`/`PROCESS`/`HANDLE`/`FINISH` protocol, authoritatively |
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| `deps/libakerror/UPGRADING.md` | 1.0.0's status registry. Required before writing an error code |
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| `deps/<library>/AGENTS.md` | Per-repo rules. Read the relevant one **before editing a submodule** |
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Before doing anything else in a fresh clone:
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```sh
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git submodule update --init --recursive
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```
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## Rules that are on you rather than on a test
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Most of the conventions in `MAINTENANCE.md` are enforced by something — a sorted-table test, a
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`WILL_FAIL` list, a Doxygen gate, a byte-compared corpus. These are not, so they are worth
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repeating where you will see them:
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- **Add tests in the same commit as the behaviour change**, and assert the *correct* contract
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even where the code is currently wrong. A known-failing test goes in
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`AKBASIC_KNOWN_FAILING_TESTS` with an open issue; it does not get pinned to the buggy
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behaviour, because that turns the eventual fix into a test failure.
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- **Never work around a missing dependency capability here.** Open an issue in that
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repository's tracker on <https://source.starfort.tech> — what the BASIC verb requires, what
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the entry point should look like, what tests would cover it. `MAINTENANCE.md` explains why,
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and names the four gaps this closed upstream. **Recording it here instead is not filing it**:
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two `akgl_ui` gaps sat in `TODO.md` for a release because changing a submodule is that
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repository's decision — which is true of changing it and not of reporting it.
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- **Never edit generated output** — `build/` trees, the generated `akerror.h`, `akgl.pc`,
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`include/akgl/SDL_GameControllerDB.h`. Change the template or the generator script.
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- **Do not reformat code you are not otherwise changing.** Several files mix tabs and spaces
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and there is no repo-wide formatter; style conversions get their own commit.
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- **Do not edit `tests/reference/`.** Those expectations came from the Go implementation and
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are never edited to suit this interpreter. A deliberate divergence goes in
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`tests/reference/README.md`'s divergence table and `docs/13-differences.md`.
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- **Open an issue for outstanding work; do not add it to `TODO.md`.**
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<https://source.starfort.tech/andrew/akbasic/issues>, or `tea issues create --repo
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andrew/akbasic`. Name the file and line, the functional consequence, and what closing it would
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touch. Publishing a problem you cannot fix yet is a contribution — and **when you learn
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something about an open issue, say so in the issue**, including that it is worse than
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recorded, already fixed, or resting on a premise that has expired.
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- **Add yourself — program, model and version — as a commit co-author.** `libakgl`'s
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`AGENTS.md` requires it and this repository follows the same rule.
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