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sanderling/docs/development/decisions.md
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pj eed99e58aa refactor: code organization cleanup (#35)
* chore: fix gitignore + decisions doc after web->inspect-ui rename

Update web/ references to inspect-ui/ in .gitignore and Makefile. Add
decisions.md tracking architectural decisions from code-org discussion.

* refactor: rename pkg/spec-api to pkg/spec

Aligns the directory name with the npm package name @sanderling/spec.
Updates Makefile, package.json directory field, and resolveSpecAPIPath.

* refactor(verifier): split bindings.go into types.go + bindings.go

Move shared public types (Action, ActionKind, LogEntry, Exception) to
types.go. bindings.go retains internal JS runtime wiring only.

* refactor(inspect): split runs.go into runs.go, runs_cache.go, runs_decode.go

runs.go: types (RunSummary, StepSummary, RunDetail, Run) and Scan.
runs_cache.go: Cache type, Open/Step/Detail methods, parseRun, scanSteps.
runs_decode.go: readMeta, tallyTrace, decodeStepSummary, validRunID.

* refactor: move android_env.go to internal/android/

Extracts Android device/AVD/adb logic into internal/android package.
Exports EnsureDevice, AdbReverse, AdbReverseRemove, EnvWithAndroidPlatformTools, AdbBinary.
Moves tests to internal/android/android_test.go. cmd/sanderling becomes a thin caller.

* refactor: extract test pipeline to internal/testrun/

runTestPipeline logic moves to testrun.Execute. buildDriver, resolveSpecAPIPath,
pickFreePort, and the progress logger move to internal/testrun/. cmd/sanderling/test_run.go
becomes a thin adapter. Tests follow their code.

* ci: update workflow paths after pkg/spec-api -> pkg/spec rename
2026-04-22 20:35:34 +07:00

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Markdown

---
title: Decisions
---
# Decisions
Architectural and organizational decisions worth recording. Each entry states the decision and the reasoning.
---
## Directory and Package Organization
### `web/` renamed to `inspect-ui/`
The directory containing the React/TypeScript frontend is `inspect-ui/`, not `web/`. The name `web/` was ambiguous (the project also has a web/Chrome driver target). `inspect-ui/` makes the purpose explicit: this is the UI for the `sanderling inspect` command.
### Keep `internal/`
Go's `internal/` directory restriction prevents any code outside this module from importing these packages. Sanderling is a CLI tool today, but the restriction costs nothing to keep and prevents accidental coupling if the module is ever used as a Go dependency. All implementation packages live under `internal/`.
### `internal/driver/` is an interface + subdirectory implementations
The `driver.go` file defines the `DeviceDriver` interface. Concrete implementations live in subdirectories: `sidecar/` (Maestro gRPC), `chrome/` (CDP), `mock/` (tests). This pattern keeps the runner and verifier decoupled from any specific platform.
### `internal/verifier/marshal.go` moves to `internal/inspect/`
`marshal.go` serializes LTL formulas to JSON for the inspect UI. That is an inspect concern, not a verifier concern. Verifier should not know inspect exists.
### `internal/verifier/bindings.go` splits into `types.go` + `bindings.go`
`bindings.go` currently holds shared types (`Action`, `ActionKind`, `LogEntry`, `Exception`) alongside JavaScript runtime wiring. The types half moves to `types.go` so the two concerns are separately navigable.
### `internal/permissions/` stays as-is
Android-only package but there is no iOS equivalent yet. Revisit if iOS gets similar permission setup.
---
### `cmd/sanderling/android_env.go` moves to `internal/android/`
Android device enumeration, AVD selection, and emulator boot logic moves to `internal/android/`. This keeps `cmd/sanderling/` as a thin CLI wrapper and makes the Android logic independently testable.
### `cmd/sanderling/test_run.go` logic moves to `internal/testrun/`
Driver setup, agent connection, verifier init, trace setup, and runner orchestration extract to `internal/testrun/`. `cmd/sanderling/` wires CLI flags to `testrun` calls and nothing more.
### `internal/inspect/runs.go` splits into multiple files
429 LOC with mixed concerns (cache, file I/O, JSON decoding, summary types) splits into at least `runs_cache.go` and `runs_decode.go` within the same package.
### `cmd/internal-tools/` stays in `cmd/`
`bundle-check` and `hier-check` are dev/debug binaries. Leave them under `cmd/` for now.
### `pkg/spec-api/` renamed to `pkg/spec/`
Aligns the directory name with the npm package name `@sanderling/spec`.