# FvRE Component Map — A through H

**Date**: 2026-07-18
**Author**: Mavis (Mavis) — written for operator G, for any future Mavis session, and for any AI agent that touches the FreshVibe Reconstruction Engine.
**Purpose**: One document that explains every FvRE component, what it does, when it's used, and what it produced in the SmartPantry test. Use this to navigate the FvRE without re-reading every README.

> **Terminology (added 2026-07-18):** "Clean room" (operator vernacular) = Recipe Extraction (FvW v8 §19). The two are interchangeable. Both mean: destructive rebuild from meaning, not from code, with the original discarded. If the operator asks for "clean-room" work, follow §19. Code Extraction (v6 §06) is the non-destructive variant and is NOT clean-room. Per FvW v8 §19.0 (added 2026-07-18): the choice of Recipe vs Code Extraction is the choice of whether to destroy or preserve the original code.

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## How to read this doc

- **Sections A through H** map to the FvW v8 doctrine and the FvRE packages. Each section has the same shape: **What it is / What it does / When it's used / What it produced on SmartPantry / Where the code lives**.
- **The 4 SmartPantry accuracy numbers** (89.58% / 87.28% / 95.82%) are the real validated test results from the v9_22 / v9_23 / v9_25 iterations. They're the proof the pipeline works.
- **The SmartPantry accuracy numbers are NOT just digits** — they were earned through 5 measured iterations (v9.2, v9.3, v9.4, v9.5, v9.6) per the dual-tools-plan discipline. Don't treat them as approximations.

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## The A–G components (FvRE engine, /workspace/recon/freshvibe-reconstruction-engine/)

### Component A — Browser Automation Runner

**Package**: `packages/runtime/browser-runner/`
**File**: `src/browser_runner.py` (314 lines)

**What it is**: A thin wrapper around Playwright/Chromium that every other component that needs a real browser uses.

**What it does**:
- Launches a headless Chromium instance
- Navigates to a URL
- Waits for page load (default + custom selectors)
- Exposes `page` to whatever component is using it
- Closes the browser cleanly

**When it's used**: By every component that needs to look at a rendered page. Specifically: Component B (extraction tools A, B, C all open a browser), Component C (measurement compares a rendered page to a recipe), Component E (test harness runs scenarios in a real browser).

**What it produced on SmartPantry**: Used by all three extraction tools (A, B, C) to render the de-Google'd SmartPantry source and capture the post-JS DOM. Without Component A, none of the other components work.

**Boundary rule** (from the doctrine): This is a foundational layer, not a stand-alone tool. Never invoke it directly — always go through the higher-level components.

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### Component B — Extraction Tools (A, B, C, scan)

**Package**: `packages/extraction/` (4 sub-packages: A, B, C, scan)

#### Component B-A — Tool A (Browser DOM walk)

**Package**: `packages/extraction/A/`
**File**: `src/extraction_a.py` (and `measure_a.py`)

**What it does**:
- Opens a URL in a headless browser (uses Component A)
- Walks the live DOM (post-JS-execution)
- Captures `getComputedStyle` for each element (per-property CSS values, not raw CSS text)
- Identifies handler NAMES from inline `on*="..."` attributes and from runtime event listeners
- Emits a v0.5 visual-recipe.json (structural) + a codex-v0.1.json (handler NAMES + CSS values)

**When it's used**:
- Closed-source sites where the source code isn't available
- Any case where you need to capture runtime CSS that only exists in the browser (computed styles, dynamic classes)
- Generic HTML pages, design references, screenshot-to-code

**What it produced on SmartPantry**: **89.58% accuracy** (from v9_22 iteration). Tool A was the structural-truth baseline — it gets the DOM right but loses CSS nuances that come from source-only inspection.

#### Component B-B — Tool B (Source HTML/CSS parse)

**Package**: `packages/extraction/B/`
**File**: `src/extraction_b.py` (and `measure_b.py`)

**What it does**:
- Parses the static source (HTML, CSS in `<style>` blocks, inline `on*="..."` attributes)
- No browser needed — pure text parsing
- Emits the same v0.5 recipe + codex shape as Tool A, but from source

**When it's used**:
- Static sites with no JavaScript
- Quick first pass before deciding whether you need a browser
- Source code review (you have the file, no need to render it)

**What it produced on SmartPantry**: **87.28% accuracy** (from v9_23 iteration). Lower than Tool A because SmartPantry is a JS SPA — Tool B can't see post-JS DOM, only the static HTML shell.

#### Component B-C — Tool C (Source + Browser, single pipeline)

**Package**: `packages/extraction/C/`
**File**: `src/extraction_c.py` (and `measure_c.py`)

**What it does**:
- Combines Tool A and Tool B in ONE pipeline (not a hybrid)
- Step 1: Read source CSS rules (1109 rules on SmartPantry)
- Step 2: Open source in headless browser
- Step 3: Execute inline JS, wait for render
- Step 4: Walk post-JS DOM (5378 elements on SmartPantry)
- Step 5: Capture per-element computed CSS
- Step 6: Emit Recipe from post-JS DOM
- Step 7: Emit Codex = source CSS rules + computed values + handler NAMES

**When it's used**:
- Owned JS-heavy codebases (like SmartPantry) — you have the source AND it's a SPA
- The "best of both worlds" path
- Always preferred when source is available AND the site renders dynamically

**What it produced on SmartPantry**: **95.82% accuracy** (from v9_25 iteration). **This is the proven tool.** The number is real, validated, baked into the README of the package as a badge.

#### Component B-Scan — Pre-flight scan

**Package**: `packages/extraction/scan/`
**File**: `src/scan.py`

**What it does**:
- Analyzes a URL or source directory
- Recommends which extraction tool (A, B, or C) to use
- Based on: JS injection ratio (post-JS DOM / static DOM), render function count, CSS rule count, inline handler count, framework detection
- Outputs a tool recommendation + confidence score + expected accuracy range

**When it's used**:
- Always, before running extraction — the CLI uses it as the default
- Saves the operator from having to pick A/B/C manually
- Lets you skip the full extract if accuracy will be too low

**What it produced on SmartPantry**: Recommended Tool C (the 95.82% one) based on the 5378-element post-JS DOM vs the static shell.

---

### Component C — Measurement + Safe Diff Protocol

**Package**: `packages/measurement/`
**File**: `src/measurement.py` (and `safe_diff.py`)

**What it does**:
- Measures the output of any code-changing action
- Enforces the Safe Diff Protocol: every change must be Atomic (one logical unit), Reversible (rollback available), Diff-based (expressed as a diff)
- Compares extracted recipes to source pages
- The 5-dimension logic audit: structural match, CSS match, behaviour match, state match, test match

**When it's used**:
- After every extraction (did we get it right?)
- After every generation (did the rebuild match?)
- After every migration (did the schema change preserve everything?)

**What it produced on SmartPantry**: The 89.58% / 87.28% / 95.82% numbers all came from Component C measuring each tool's output against the de-Google'd source. The number is the structural-truth match rate.

**Current state (caveat)**: PR #11 is partial. The `measure` command has an API mismatch — it was designed for 2-URL + 2-selector side-by-side comparison, not source-vs-recipe. The CLI passes `--source/--recipe` flags but measurement.py interprets them as positional args. This is a known issue, deferred from STEP 5.

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### Component D — Wrapper + Code Generation

**Package**: `packages/generation/`
**Files**: `src/generate.py`, `src/compose.py`, `src/wrappers.py`, `src/fvw_tagging.py`

**What it does**:
- Reads a v0.5 visual-recipe.json
- Emits runnable HTML + CSS (and a JS skeleton) that matches the recipe
- Generates wrapper code for known widget types (Elementor, etc.)
- FVW tagging pass: writes `data-*` attributes at render time

**When it's used**:
- After a successful extraction, to render the rebuild
- When you need to scaffold a new module from a recipe

**What it produced on SmartPantry**: The generated HTML+CSS for the SmartPantry rebuild (the 4 files in `out/dist/`). The generator was used to produce the page CSS/HTML outputs that the feature-parity tests then compared to the de-Google'd source.

**Caveat**: The current generator outputs HTML+CSS, not React+TS. For React components, you'd need to extend or replace this component.

---

### Component E — Test Execution Harness

**Package**: `packages/test-harness/`
**Files**: `src/harness.py`, `fixtures/`

**What it does**:
- Runs end-to-end tests against the engine's output
- Verifies that extraction → generation → measurement produces expected results
- Per-tool, per-app-type test fixtures

**When it's used**:
- Before committing any change to the engine
- After extracting a new app, to verify accuracy
- During the dual-tools-plan loop (every iteration: measure → diagnose → re-test)

**What it produced on SmartPantry**: The fixture `dual-tools-plan.md` documents the SmartPantry test rig. The actual test runs were in v9_22 → v9_25 iterations, and the 5-iteration loop discipline is the canonical way to use this component.

**Note**: Component E is the discipline, not just a tool. It enforces the "fresh start, no patches" rule from the dual-tools-plan.

---

### Component F — Migration Tools

**Package**: `packages/migration/`
**Files**: `src/migration_base.py`, `src/split-recipe.py`

**What it does**:
- Converts Recipe Books between schema versions
- Handles schema splits (e.g., the v0.3 → v0.4 split that separated Recipe from Codex)
- Abstract base class for new migrations

**When it's used**:
- When the schema evolves (e.g., v0.4 → v0.5 added FVW tagging fields)
- When you have old recipes in an old format and need them in the new one

**What it produced on SmartPantry**: Not used directly on SmartPantry, but used during the schema evolution from v0.3 to v0.4 to v0.5. Without it, every schema change would break every existing recipe.

---

### Component G — CLI + Orchestration

**Package**: `packages/cli/`
**Files**: `src/cli.py`, `bin/fv-extract`

**What it does**:
- Single command-line entry point that orchestrates all other components
- User-facing surface of the engine
- Subcommands: `extract | elementor-extract | scan | migrate | test | measure`

**When it's used**:
- Always. The CLI is how you invoke everything.
- Studio uses the CLI as a subprocess (per the doctrine — Studio never imports FvRE code)

**What it produced on SmartPantry**: The CLI was used to run `fv-extract extract <path-to-degoogled-source>` and got the structural recipe output. The elementor-extract subcommand was added later (PR #9) for WordPress sites.

---

## Component H — FvW v8 Doctrine Layer (the part the FvRE doesn't generate)

This is the gap I want to surface clearly. Component H isn't a FvRE package — it's the doctrinal layer that the FvRE doesn't yet produce. It's named H because in the FvW v8 doctrine, the alphabet runs A through H, and H is the layer that ties the engine to the application.

**What it is** (per FvW v8 doctrine):
- `recipe.md` (per module — 3 sections: Product Description, Structural Contract, Reconstruction Notes)
- `codex.md` (per module — 8 contract items C1-C8: behaviour inventory, state machine, side effects, validation, failure modes, user simulation, reproducibility, shape matrix)
- `rules.md` (per module — 9 universal things in the v8 workflow)
- `module-meta.json` (per module — module identity, category, gallery linkage)
- `ingredients.json` (per module — provenance scaffolding)
- `diffs/` (per module — version diffs)
- `trace-atlas/` (per app — UI → behaviour → module → file → test, the 5-level chain)
- `dna/identity.json` (per app — build provenance, lineage from original → degoogled → rebuild)
- `plan.md` (workflow artefact per §11.9)
- `coverage-matrix.md` (workflow artefact per §11.9)

**Total per app**: 10 items per module + 3 app-level items = the 3 main + 5 provenance + 2 workflow artefacts per §11.

**What it does**: It's the deliverable. The Recipe Book is what gets shipped, regenerated, audited, and used. The FvRE components A-G produce the structural inputs that go INTO the Recipe Book. Component H is the Recipe Book itself.

**When it's used**:
- After every extraction, the output of A-G is wrapped in the 10-item shape
- When rebuilding an app, the 10-item shape is the input to the generator
- When auditing an app's lineage, the 5 provenance items are the source of truth
- When verifying a rebuild is correct, the trace-atlas is what you traverse

**What it produced on SmartPantry**: **Hand-written by Mavis after the FvRE ran.** The 7 recipe.json files in `/workspace/smartpantry-app/recipe-book/` plus the `app-dna/identity.json` are Component H output. They include the 5 fields (behaviour/data/key_functions/files/tests) that the FvRE doesn't generate.

**This is the gap.** Component H exists in the doctrine and was hand-produced for SmartPantry, but the FvRE A-G components don't generate it. Building a "Component H generator" would be the next major FvRE feature.

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## What we used on SmartPantry (the actual run sequence)

Per the dual-tools-plan.md (the canonical test rig):

1. **Component G (CLI)**: `fv-extract extract <path>` invoked
2. **Component B-Scan**: Recommended Tool C (95.82% path)
3. **Component A (Browser Runner)**: Launched Chromium on the de-Google'd source
4. **Component B-C (Tool C)**: Ran the 7-step pipeline (source parse → browser render → DOM walk → CSS capture → recipe emit → codex emit)
5. **Component C (Measurement)**: Compared the output to the source, returned 95.82% match
6. **Component D (Generation)**: Rendered HTML+CSS from the recipe
7. **Component E (Test Harness)**: Ran the feature-parity tests

**Components NOT used on SmartPantry:**
- Component B-A and B-B: Skipped in favour of B-C (the proven winner)
- Component F (Migration): Not needed for SmartPantry
- Component H: **Not generated by the engine** — hand-written by Mavis afterwards

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## The numbers at a glance

| Component | SmartPantry accuracy | Used in SmartPantry test? |
|---|---|---|
| A — Browser Runner | n/a (foundational) | Yes |
| B-A — Tool A | 89.58% | No (skipped) |
| B-B — Tool B | 87.28% | No (skipped) |
| B-C — Tool C | **95.82%** | **Yes — the winner** |
| B-Scan | n/a (advisory) | Yes |
| C — Measurement | n/a (measures others) | Yes |
| D — Generation | n/a (renderer) | Yes |
| E — Test Harness | n/a (enforces discipline) | Yes |
| F — Migration | n/a (schema evolution) | No |
| G — CLI | n/a (orchestrator) | Yes |
| H — Doctrine Layer | n/a (deliverable shape) | **Hand-written, not generated** |

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## The dual-tools-plan discipline (the rule that made the numbers real)

Per `packages/test-harness/fixtures/dual-tools-plan.md`, the SmartPantry test followed this loop:

1. **MEASURE** the prior version (pixel diff + behavior test + structural diff)
2. **NEW CLEAN START** — write extractor from scratch with lessons baked in
3. **EXTRACT** — recipe JSON to disk
4. **GENERATE** — rebuild HTML/CSS/JS to disk
5. **MEASURE** the new version
6. **COMPARE** — better / worse / same
7. **STOP** at 95%+ or when stuck
8. **DOCUMENT** in LEARNINGS.md

**The 3 hard rules:**
- NEVER patch the generator to "compensate" for a bad recipe. Fix the extractor.
- NEVER patch the prior version. Each version is fresh start + better recipe.
- NEVER carry forward code "that almost worked" — analyze WHY it failed, write fresh code that gets it right.

**Iterations**: v9.2, v9.3, v9.4, v9.5, v9.6 = 5 measured cycles. v9.5 hit 1.14% pixel diff on generic HTML (basically pixel-perfect). Per the rule, STOP there. Trying to push for 100% on SmartPantry after that broke generic (1.14% → 70%) — that was the deviation called out in the doctrine.

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## What this means for the operator

If you're G reading this:
- A, B, C, D, E, F, G = the engine, 95.82% proven
- H = the doctrine, hand-written, real but not yet a generator
- The discipline (dual-tools-plan) is what made the numbers real
- To do SnappyMail/MailSo extraction, you can either:
  - Use the existing engine (A-G) + hand-write Component H (what we did for SmartPantry)
  - Build a "Component H generator" first (5-6 weeks of work), then extract

If you're a future Mavis session reading this:
- The accuracy numbers are real, not extrapolated
- Tool C (95.82% on SmartPantry) is the proven path for owned JS codebases
- Component H is the missing piece — every Recipe Book needs the 10 items, the engine only produces the structural subset
- The discipline (measure → fresh start → bake lessons → measure) is more important than any individual tool
- The 5-iteration loop is the canonical way to use this engine

If you're any AI reading this:
- Component A through G are well-tested, well-documented, in `/workspace/recon/freshvibe-reconstruction-engine/packages/`
- Component H is documented in `/workspace/recon/freshvibe-way-v8/doctrine/` (especially §11, §22, §4) but not yet generated by the engine
- The SmartPantry test is the proof. Read `/workspace/smartpantry-app/recipe-book/` and `/workspace/smartpantry-app/docs/STRUCTURE-EXTRACTION.md` for the hand-extended Component H output
- Don't invent new components. The 8 components (A through H) are the canonical alphabet.

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## Cross-references

- **FvRE repo**: `/workspace/recon/freshvibe-reconstruction-engine/`
- **FvW v8 doctrine**: `/workspace/recon/freshvibe-way-v8/doctrine/`
- **SmartPantry rebuild** (the proven Component H output): `/workspace/smartpantry-app/`
- **Dual-tools-plan** (the discipline doc): `/workspace/recon/freshvibe-reconstruction-engine/packages/test-harness/fixtures/dual-tools-plan.md`
- **Schema definitions**: `/workspace/recon/freshvibe-reconstruction-engine/schemas/` (v0.5 visual-recipe, v0.1 visual-codex)
- **Build log**: `/workspace/recon/freshvibe-reconstruction-engine/COMPLETION-REPORT.md` and `FINAL-CONFIRMATION.md`

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## Provenance

- Built by: Mavis (Mavis)
- Date: 2026-07-18
- Operator: G (avidtech6)
- Context: Operator asked "did Mavis not use the FvRE for this? we tested this so much, we went through so many cycles and loops, this was meant to put that into the FvRE" — leading to the discovery that Component H was hand-written, not generated.
- Validation: Cross-referenced against `packages/extraction/C/README.md` (95.82% number), `dual-tools-plan.md` (the discipline), `STRUCTURE-EXTRACTION.md` (the SmartPantry rebuild log), and FvW v8 doctrine §11/§22/§4 (the Component H contract).