Rajeet

.devcontainer/devcontainer.json

@@ -0,0 +1,18 @@
+{
+  "name": "TinyColor Go",
+  "image": "mcr.microsoft.com/devcontainers/go:1-1.26-bookworm",
+  "features": {
+    "ghcr.io/devcontainers/features/node:1": {
+      "version": "22"
+    },
+    "ghcr.io/devcontainers-extra/features/deno:1": {}
+  },
+  "postCreateCommand": "make build",
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "golang.Go"
+      ]
+    }
+  }
+}

.gitattributes

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+mod.js text eol=crlf
+test.js text eol=crlf
+tinycolor.js text eol=crlf
+bench/*.jsonl text eol=lf
+
+# Keep upstream oracle and published JavaScript copies in the repository for
+# differential testing, but exclude them from the implementation language chart.
+mod.js linguist-vendored
+test.js linguist-vendored
+tinycolor.js linguist-vendored
+npm/** linguist-vendored
+dist/** linguist-generated

.github/workflows/port.yml

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+name: TinyColor Go port
+
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  verify:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: '1.26'
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '24'
+      - uses: denoland/setup-deno@v2
+        with:
+          deno-version: v2.x
+      - run: make verify
+      - run: deno test test.js
+      - run: make build
+      - uses: actions/upload-artifact@v4
+        with:
+          name: tinycolor-linux-amd64
+          path: bin/tinycolor

.gitignore

@@ -7,3 +7,5 @@ node_modules
 .vscode
 cov_profile
 cov_profile.lcov
+.cache/
+bin/

.planning/PROJECT.md

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+# TinyColor Go Port
+
+## What This Is
+
+Create a fresh Go port of the local `bgrins/TinyColor` checkout with behavioral
+parity demonstrated through unchanged-source differential testing.
+
+## Core Value
+
+Observable behavior from the pinned TinyColor checkout is the specification;
+the Go port is accepted only when exact differential evidence agrees.
+
+## Requirements
+
+- The upstream JavaScript source is untouched.
+- Go handles every behavior covered by the defined compatibility corpus.
+- A reproducible command reports compatibility results and mismatch details.
+- A documented Go API and CLI are usable from a clean checkout.
+- CI, benchmarks, attribution, and known differences are present.
+
+## Constraints
+
+- Target source: local `mod.js` / `test.js`; MIT attribution retained.
+- Target language: Go 1.26+; standard library first.
+- Node and Deno are available as local oracle runtimes.

.planning/REQUIREMENTS.md

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+# Requirements
+
+## Functional
+
+- **PAR-01:** Parse all string formats and object forms accepted by local TinyColor.
+- **PAR-02:** Preserve validation, format, original-input, clamping, wrapping, and alpha behavior.
+- **FMT-01:** Reproduce color conversion and every documented output representation.
+- **OPS-01:** Reproduce mutation, utilities, readability, and palette operations.
+- **EQV-01:** Compare Go and local JavaScript behavior through a reusable differential harness.
+- **DEL-01:** Provide Go API, CLI, CI, benchmarks, documentation, and attribution.
+
+## Quality
+
+- **QLT-01:** Do not edit the JavaScript source or source tests to achieve parity.
+- **QLT-02:** Record every mismatch with complete reproducer and owner.
+- **QLT-03:** Keep checks reproducible from a clean checkout.
+
+## Out of scope
+
+New CSS color syntaxes, a web UI, package publication, and compatibility with a
+different TinyColor version.
+

.planning/ROADMAP.md

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+# Roadmap: TinyColor.js to Go
+
+## Overview
+
+Build a separate, evidence-backed Go port while preserving this checkout as an
+immutable JavaScript behavioral oracle. Work moves from an executable oracle,
+through parsing and observable output, to operations and delivery proof.
+
+## Phases
+
+- [x] **Phase 1: Foundation and Oracle** - Establish the Go module and a reproducible Node-to-Go differential baseline.
+- [x] **Phase 2: Parsing and Color State** - Match accepted inputs and normalized TinyColor state.
+- [x] **Phase 3: Conversion and Representation** - Match conversion, output, and analysis behavior.
+- [x] **Phase 4: Operations and Palettes** - Match manipulation, readability, and color-combination behavior.
+- [x] **Phase 5: Delivery Evidence** - Ship the CLI, CI, benchmarks, and submission documentation.
+
+## Phase Details
+
+### Phase 1: Foundation and Oracle
+**Goal**: A contributor can run the same JSONL request against local `mod.js` and the Go runner, obtain a structured comparison report, and see the upstream files remain untouched.
+**Depends on**: Nothing (first phase)
+**Requirements**: [EQV-01, QLT-01, QLT-03]
+**Success Criteria**:
+  1. `src/` builds as an independent module without changing JavaScript source files.
+  2. Node and Go runners accept and emit the documented JSONL request/response protocol.
+  3. A differential command reports case count, mismatch count, and complete mismatch records.
+**Plans**: 1 plan (complete 2026-08-01)
+
+Plans:
+- [x] 01-01: Create the Go module, JSONL runners, smoke corpus, and baseline report.
+
+### Phase 2: Parsing and Color State
+**Goal**: Go accepts the same supported TinyColor inputs and retains the same validity, format, alpha, and normalized color state.
+**Depends on**: Phase 1
+**Requirements**: [PAR-01, PAR-02, QLT-02]
+**Success Criteria**:
+  1. Hex, RGB(A), HSL(A), HSV(A), CSS names, transparent, and object inputs produce matching state.
+  2. Permissive syntax, boundary values, invalid input, and alpha normalization match the oracle corpus.
+  3. Every discovered parser mismatch has a deterministic regression record.
+**Plans**: 2 plans (complete 2026-08-01)
+
+Plans:
+- [x] 02-01: Replace Phase 1 fixed inputs with normalized color/model and HEX/RGB/name parsing.
+- [x] 02-02: Add HSL/HSV/object parsing and parser differential corpus.
+
+### Phase 3: Conversion and Representation
+**Goal**: Go exposes TinyColor-equivalent conversion, string formatting, format fallback, and color analysis.
+**Depends on**: Phase 2
+**Requirements**: [FMT-01, QLT-02]
+**Success Criteria**:
+  1. RGB, percentage RGB, HSL, HSV, hex, hex8, name, filter, and generic string outputs match exactly.
+  2. Brightness, luminance, equality, cloning, and random behavior have documented parity cases.
+  3. No undocumented floating-point tolerance masks an observable mismatch.
+**Plans**: 2 plans (complete 2026-08-01)
+
+Plans:
+- [x] 03-01-PLAN.md — Implement B's source-equivalent conversion, representation, and analysis facade.
+- [x] 03-02-PLAN.md — Add C's JSONL dispatch, differential corpus, and compatibility evidence.
+
+### Phase 4: Operations and Palettes
+**Goal**: Go matches TinyColor's stateful modifiers, static utilities, readability checks, and palette ordering.
+**Depends on**: Phase 3
+**Requirements**: [OPS-01, QLT-02]
+**Success Criteria**:
+  1. Modifiers preserve default, zero, clamping, wrapping, alpha, and mutation behavior.
+  2. Readability and most-readable operations match WCAG option defaults.
+  3. Every palette operation returns source-equivalent colors in source order.
+**Plans**: 6 plans (complete 2026-08-01)
+
+Plans:
+- [x] 04-01 through 04-06: Typed operations, WCAG readability, palettes, compatibility dispatch, and differential evidence.
+
+### Phase 5: Delivery Evidence
+**Goal**: A judge can clone the project, verify parity evidence, use a Go CLI, and understand the migration and its limitations.
+**Depends on**: Phase 4
+**Requirements**: [DEL-01, QLT-03]
+**Success Criteria**:
+  1. CI runs format, vet, Go tests, and the differential smoke report.
+  2. The CLI supports parse, convert, lighten, palette, and contrast, including JSON output.
+  3. Benchmarks, documentation, license attribution, team work, and known differences are complete.
+**Plans**: 3 plans (complete 2026-08-01)
+
+Plans:
+- [x] 05-01: Add the human CLI, reproducible build/verification gate, Docker artifact, and CI.
+- [x] 05-02: Publish differential fuzz and shared-workload benchmark evidence.
+- [x] 05-03: Publish judge-facing documentation and verify local/public delivery evidence.
+
+## Progress
+
+| Phase | Plans Complete | Status | Completed |
+|---|---|---|---|
+| 1. Foundation and Oracle | 1/1 | Complete | 2026-08-01 |
+| 2. Parsing and Color State | 2/2 | Complete | 2026-08-01 |
+| 3. Conversion and Representation | 2/2 | Complete | 2026-08-01 |
+| 4. Operations and Palettes | 6/6 | Complete | 2026-08-01 |
+| 5. Delivery Evidence | 3/3 | Complete | 2026-08-01 |

.planning/STATE.md

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+# Project State
+
+**Updated:** 2026-08-01
+
+## Current Position
+
+- Phase 5 of 5: Delivery Evidence — complete.
+- All three Phase 5 plans and all milestone implementation plans are complete.
+- Remaining human submission action: record, upload, and link the five-minute demo video.
+
+## Verified Evidence
+
+- Public repository: https://github.com/rajeet-04/TinyColor
+- Unauthenticated `ls-remote` returned branch `rajeet` at
+  `1c218b669d192e37b7019b08395cf348410dde79`.
+- GitHub Actions run 30686980719 passed `make verify`, Deno, build, and artifact
+  upload for that exact commit:
+  https://github.com/rajeet-04/TinyColor/actions/runs/30686980719
+- Immutable JavaScript oracle hashes: 3/3 verified.
+- Exact corpora: smoke 9/9, HEX/RGB 26/26, parser 23/23, conversion 35/35,
+  operations 71/71; 164/164 total and zero mismatches.
+- Go tests/vet and 15 Node tests pass.
+- Immutable Deno source suite: 45 passed, 0 failed, 1 ignored.
+- Byte-identical original suite against native Go: 45 passed, 0 failed, 1 ignored.
+- Differential fuzz evidence: 60.012 seconds, seed 20260801, 1,091,630 cases,
+  zero divergences.
+- Shared benchmark: 20 cold starts and 1,000 persistent requests per runtime,
+  with startup p99, latency p99, throughput, and peak RSS recorded.
+- Go `unsafe` source occurrences: 0.
+
+## Recent Decisions
+
+- Use the pinned V8-derived 8-bit luminance transfer table for exact `Math.pow` parity.
+- Apply TinyColor's sub-one RGB rounding once at the `FromCompat` boundary.
+- Keep fuzz comparisons exact and normalize benchmark workload newlines before hashing.
+- Never claim external evidence until public access and exact-commit CI are observed.
+- Use a test-only synchronous facade to run unchanged source assertions against
+  the native Go binary without duplicating TinyColor algorithms.
+
+## Session Continuity
+
+Last session: 2026-08-01
+Stopped at: Phase 5 complete; demo video remains a human submission action.
+Resume file: none

.planning/config.json

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+{
+  "project": "tinycolor-go-port",
+  "source_oracle": "mod.js",
+  "source_tests": "test.js",
+  "target_language": "go",
+  "commit_docs": true,
+  "research_enabled": true,
+  "plan_checker_enabled": true,
+  "nyquist_validation_enabled": true,
+  "workflow": {
+    "nyquist_validation": true,
+    "ui_phase": false,
+    "ui_safety_gate": false
+  }
+}

.planning/debug/fuzz-readability-precision.md

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+---
+status: resolved
+trigger: "Investigate and fix next deterministic Phase 5 fuzz parity mismatch: readability for {r:127,g:64,b:15,a:0} against '#80007f' returns 1.188086751976723 in JavaScript and 1.1880867519767233 in Go."
+created: 2026-08-01T00:00:00+05:30
+updated: 2026-08-01T06:00:00+05:30
+---
+
+## Current Focus
+
+hypothesis: resolved: exact V8-derived results are required for the finite 8-bit luminance domain
+test: exact readability regression, 71-case operations corpus, and broad seeded fuzz harness
+expecting: exact parity with no tolerance or output rounding
+next_action: record and validate the required 60-second seed-20260801 fuzz log
+
+## Symptoms
+
+expected: JavaScript and Go exact JSON response match for readability; JavaScript returns 1.188086751976723.
+actual: Go returns 1.1880867519767233; broad seed-1 one-second fuzz run has 388 divergences and fuzz-32 is first.
+errors: exact floating-point JSON mismatch for operation readability
+reproduction: exact request is in .superpowers/sdd/05-02-PLAN/task-1-report.md; run through both adapters and typed Readability with input {r:127,g:64,b:15,a:0}, args.other '#80007f'.
+started: uncovered after the fuzz saturation root-cause fix.
+
+## Eliminated
+
+## Evidence
+
+- timestamp: 2026-08-01T00:01:00+05:30
+  checked: repository status and protected fuzz files
+  found: fuzz/README.md is modified and fuzz/harness.mjs plus fuzz/harness.test.mjs are untracked pre-existing work
+  implication: preserve those files without editing, staging, reverting, or narrowing them
+- timestamp: 2026-08-01T00:01:00+05:30
+  checked: debug knowledge base
+  found: only prior saturation rounding case exists and its keywords/root cause do not match readability precision
+  implication: no known-pattern candidate applies
+- timestamp: 2026-08-01T00:01:00+05:30
+  checked: complete JavaScript getLuminance/readability and Go Color.Luminance/Readability implementations plus callers
+  found: both round normalized RGB before luminance and use the same WCAG constants; Go caches the two luminances once while JavaScript recomputes them for Max and Min; IsReadable and MostReadable both call shared Readability
+  implication: parsing and exact arithmetic intermediates must be measured before changing the shared method
+- timestamp: 2026-08-01T00:02:00+05:30
+  checked: exact requests through both adapters
+  found: normalized RGB inspections are identical; first luminance is identical at 0.08213307169664993, but #80007f luminance is 0.06121500300950977 in JavaScript and 0.061215003009509765 in Go
+  implication: parsing, alpha, and final ratio ordering are ruled out; the first divergence is inside shared Color.Luminance for integer RGB 128,0,127
+- timestamp: 2026-08-01T00:03:00+05:30
+  checked: new exact typed regression and exact operations JSONL row before production changes
+  found: typed test fails with 1.1880867519767233 and corpus has exactly one mismatch at readability-object-precision
+  implication: RED is confirmed and independently covers both public Go API and adapter parity
+- timestamp: 2026-08-01T00:04:00+05:30
+  checked: channel-level gamma expansion raw float bits for #80007f
+  found: channel 128 has identical normalized/base input but V8 Math.pow yields bits 3fcba1511e3e632d while Go math.Pow yields 3fcba1511e3e632c; channel 127 matches at 3fcb2a60a1263b0a
+  implication: the root cause is Go math.Pow not reproducing the JavaScript oracle's power rounding, not weighted luminance summation
+- timestamp: 2026-08-01T00:04:00+05:30
+  checked: all nonlinear integer channels 11 through 255
+  found: 93 of 245 channel powers differ, with signed deltas in both directions and two cases differing by two ULPs
+  implication: unconditional Nextafter or decimal/output rounding would be incorrect; the fix must reproduce the bounded transfer function or V8 algorithm
+
+## Resolution
+
+root_cause: V8 Math.pow and Go math.Pow produce different final float64 bits for 93 of TinyColor's 245 nonlinear 8-bit channel values.
+fix: Color.Luminance now uses a finite V8-derived 256-entry transfer table. The follow-on palette divergences were fixed at their shared constructor boundary by applying TinyColor's sub-one channel rounding and bound01 normalization.
+verification: The exact regression passed; all 71 operations cases matched; the full local verify equivalent passed; seed 1 ran for 1.008 seconds across 14,778 cases with zero divergences.
+files_changed: [src/tinycolor/luminance.go, src/tinycolor/color.go, src/tinycolor/operations_test.go, src/cmd/pow-debug/main.go]