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eSliderandCursor c575341178 feat(go-config): multi-format codecs, envc CLI, fixtures, ASRs

- Module github.com/eslider/go-config with env/yaml/json/ini packages
- internal: source, keymap, merge, structconv, bytesutil
- cmd/envc: convert, get, merge
- docs/asr ASR-0001..0008, README/CHANGELOG/AGENTS refresh
- golangci-lint v2 config; tests + fixtures

Co-authored-by: Cursor <cursoragent@cursor.com>

2026-05-02 14:04:01 +01:00

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ASR-0003: Uniform codec API and Source abstraction

Context

Users switch between YAML, JSON, INI, and env-file formats; a different function surface per format would increase cognitive load and test matrices.

Decision

Every format package exports New(opts...) *Codec with Map, Unmarshal, UnmarshalContext, Marshal, WriteTo.
Bytes, readers, files, and URLs are modeled by internal/source.Source with Open(ctx) (io.ReadCloser, error).
HTTP(S) sources support WithHTTPHeader and WithHTTPClient.

Consequences

Cross-format examples in the README stay structurally identical.
URL behaviour is testable with httptest against our client only.

Status

Accepted — 2026-05-02.

References

ASR-0005 — merge semantics across multiple sources
ASR-0008 — httptest policy alignment

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