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+# Step Library Expansion + Per-Recipe Configurability + Audit Coverage
+
+**Date:** 2026-04-29
+**Modules:** `fusion_plating` (core), `fusion_plating_jobs`, `fusion_plating_reports`
+**Status:** Approved by user, ready for implementation plan
+
+## Problem
+
+The plating-shop step library (`fp.step.template`) covers ~60% of a real plating workflow but is missing several common steps (Receiving, Electroclean, Strike, Salt Spray, Adhesion Test, Hardness Test, Packaging, Tank Replenishment). Existing kinds have light default measurement seeding — many industry-standard fields (Bath ID, current density, photo evidence, multi-point thickness) aren't authored by default, so audit-required values often get skipped.
+
+The recipe author also can't customise step measurements at the recipe level — they can only edit the library template, which affects every recipe that step appears in. There's no per-recipe override for prompts, target ranges, or instructions.
+
+The office team writes per-step instructions that operators read at runtime; this channel exists but is hidden in a tab and isn't surfaced in the simple recipe editor for inline editing.
+
+## Goals
+
+1. Cover the full plating workflow with appropriate Step Kinds and audit-grade default measurements.
+2. Add specialised input types (`photo`, `multi_point_thickness`, `bath_chemistry_panel`, `ph`) that match real shop instrumentation.
+3. Make every prompt **per-recipe configurable** — recipe authors can disable, rename, retarget, reorder, or add custom prompts on each recipe step without touching the library.
+4. Make office→operator instructions visible and editable directly in the simple recipe editor, with library default + per-recipe override.
+5. Wire all of the above through to runtime (`fp.job.step` input wizard, tablet QC checklist, CoC chronological report) so recorded values are captured for audit.
+6. Battle-test end-to-end after deploy.
+
+## Non-Goals
+
+- IoT/sensor auto-fill of measurements (read pH probe / bath chemistry panel directly from instruments) — separate project.
+- Customer-portal display of recorded measurements — separate.
+- Step Kinds beyond the 8 added here (deburring, anodize seal, abrasive blasting) — same pattern, easy to add later.
+- Replacing the existing tablet OWL QC checklist — extend only.
+- Per-customer or per-part override of step measurements — separate concern (parts already carry their own recipe variant).
+
+## Architecture Map
+
+```
+fp.step.template (library — office authors here)
+  ├── description (Html, "Default Operator Instructions")
+  ├── default_kind (Selection, drives DEFAULT_INPUTS_BY_KIND)
+  ├── input_template_ids → fp.step.template.input
+  └── transition_input_ids → fp.step.template.transition.input
+       ↓ [snapshot copy on drag into recipe]
+fusion.plating.process.node (recipe step — recipe authors override here)
+  ├── description (Html, per-recipe override; empty = fall back to library)
+  ├── collect_measurements (Boolean, master switch — NEW)
+  └── input_ids → fusion.plating.process.node.input
+       ├── collect (Boolean, per-prompt opt-out — NEW)
+       ├── template_input_id (m2o — NEW, traceability for "reset to defaults")
+       └── (existing fields: name, input_type, target_min/max, target_unit, required, hint, sequence, kind)
+       ↓ [MO/job creation copies recipe nodes]
+fp.job.step (work order step — operator records here)
+       ↓ [Mark Done → input wizard fires, FILTERED to collect=True only]
+fp.job.step.input.wizard.line
+       ↓ [operator types values → commit]
+fp.job.step.move (transfer_type='step', json input data)
+       ↓ [QWeb render]
+report_coc_chronological.xml (audit document — only collect=True inputs)
+```
+
+## New Step Kinds
+
+Added to `fp.step.template.default_kind` Selection and `DEFAULT_INPUTS_BY_KIND`:
+
+| Kind code | Label | Default Operation Measurements |
+|---|---|---|
+| `receiving` | Receiving / Incoming Inspection | Qty Received, Qty Rejected, Customer PO# Verified (boolean), Packing Slip #, Condition Notes, Damage Photo (photo, optional), Inspector Initials (signature) |
+| `electroclean` | Electroclean | Time, Temperature, Amperage (A), Voltage (V), Current Density (ASF), Polarity (selection: anodic/cathodic/periodic), Bath ID |
+| `strike` | Strike (Wood's Nickel / Activation) | Time, Temperature, Amperage (A), Voltage (V), Current Density (ASF), Bath ID |
+| `salt_spray` | Salt Spray / Corrosion Test | Test Duration (hr), Result (pass_fail), Red Rust %, White Corrosion %, Lab Report (photo) |
+| `adhesion_test` | Adhesion Test | Test Method (selection: bend/tape/burnish/file), Result (pass_fail), Photo of Coupon (photo) |
+| `hardness_test` | Hardness Test (HV / HK / HRC) | Test Load (gf), Reading 1/2/3 (multi_point_thickness), Average (number), Equipment ID, Last Calibration Date |
+| `packaging` | Packaging / Pre-Ship | Packaging Type (selection: VCI bag/bubble wrap/separator paper/custom crate), Qty Per Package, Package Count, Cert Package Included (boolean), Customer-Supplied Packaging (boolean) |
+| `replenishment` | Tank Replenishment | Bath ID, Chemistry Added (text), pH Before (ph), pH After (ph), Concentration Before, Concentration After, Operator Initials (signature) |
+
+## Beefed-Up Defaults on Existing Kinds
+
+Idempotently appended via `action_seed_default_inputs` (skips if name already present):
+
+| Existing Kind | New seeded inputs |
+|---|---|
+| `racking` | Rack ID, Masking Applied (boolean), Photo of Racked Load (photo) |
+| `derack` | Mask Removal Method (selection), Residue Check (pass_fail) |
+| `mask` | Mask Material (selection: Microshield/latex tape/vinyl plugs/wax), Photo (photo) |
+| `demask` | Residue Check (pass_fail), Surface Condition (selection: clean/marks/needs rework) |
+| `cleaning` | Bath ID, Ultrasonic On (boolean), Titration Done (boolean) |
+| `etch` | Acid Concentration (% or g/L), Bath ID, HE Risk Flag (boolean) |
+| `rinse` | Rinse Type (selection: cascade/spray/DI/city), Conductivity µS/cm, Time |
+| `plate` | Bath ID, pH (ph), Bath Concentration (g/L), Current Density ASF (electroplate), Multi-Point Thickness (multi_point_thickness) |
+| `bake` | Oven ID, Chart Recorder File (photo) |
+| `inspect` | Defect Type (selection), Thickness Sample, Photo, Inspector Signature |
+| `final_inspect` | Defect Categorization (selection), Dimensional Verification (pass_fail), Surface Finish Ra, Inspector Signature |
+| `wbf_test` | Retest Count, Photo on FAIL (photo) |
+| `dry` | Dry Method (selection), Time, Temperature |
+| `ship` | Carrier (selection), Tracking #, BoL #, Photo of Sealed Shipment |
+
+## New Input Types
+
+Added to `fp.step.template.input.input_type`, `fusion.plating.process.node.input.input_type` (the recipe-step input model), and `fp.job.step.input.wizard.line.input_type` (runtime wizard):
+
+| Type code | Label | Renders as |
+|---|---|---|
+| `photo` | Photo | Binary widget with `image` rendering — capture or upload one image |
+| `multi_point_thickness` | Multi-Point Thickness (avg) | Five number inputs (R1–R5) + auto-computed average; min/max bounds applied to average |
+| `bath_chemistry_panel` | Bath Chemistry Panel | Bundle: pH + concentration + temperature + bath ID — saves clicks for plate steps |
+| `ph` | pH | Number input clamped to 0–14, two-decimal precision |
+
+`signature` already exists; will be auto-seeded on more kinds via the new defaults.
+
+## Per-Recipe Configurability — Model Changes
+
+| Field | Lives on | Type | Default | Purpose |
+|---|---|---|---|---|
+| `collect` | `fusion.plating.process.node.input_ids` row | Boolean | `True` | Per-prompt opt-out. Wizard / report filter to `collect=True` only |
+| `template_input_id` | same | Many2one to `fp.step.template.input` | (snapshot link) | Traceability — "this prompt was seeded from library template X". Powers "reset to library defaults" |
+| `collect_measurements` | `fusion.plating.process.node` | Boolean | `True` | Master switch. When `False`, runtime skips the input wizard entirely for this step |
+
+Existing fields on `fusion.plating.process.node.input_ids` (`name`, `input_type`, `target_min`, `target_max`, `target_unit`, `required`, `hint`, `sequence`, `selection_options`) are already editable — recipe author can rename / retarget / reorder freely without touching the library.
+
+## Per-Recipe Configurability — Recipe Author Capabilities
+
+Each recipe step exposes:
+
+1. **Disable a prompt** — toggle `collect` off (preserves history; not deleted)
+2. **Override target range** — edit `target_min` / `target_max` per recipe
+3. **Rename a prompt** — edit `name`
+4. **Reorder prompts** — drag handle on `sequence`
+5. **Mark required per recipe** — flip `required` independently of library
+6. **Add custom prompt** — new row with `template_input_id = False`
+7. **Disable entire step's data collection** — master `collect_measurements = False` on the recipe node
+8. **Reset to library defaults** — re-sync `input_ids` + `description` from linked library template, preserve custom rows where `template_input_id = False`
+
+## Operator Instructions (Office → Floor)
+
+`fp.step.template.description` (Html) — relabel UI to **"Default Operator Instructions"** with tooltip *"Standing instructions the office gives operators for this step. Snapshot-copied onto every recipe that uses this step. Recipe authors can override per recipe."*
+
+`fusion.plating.process.node.description` (existing, already snapshot-copied) is the per-recipe override. Empty recipe-node `description` falls back to library at runtime so blank means "use library default", not "show nothing".
+
+Runtime visibility — three places:
+1. **Tablet shop-floor card** — instructions panel above input prompts (expandable)
+2. **Backend Mark-Done wizard** — same panel at top of input form
+3. **Printed traveller / WO sheet** — instructions section under each step heading
+
+## Simple Recipe Editor — UI Changes
+
+Each step card gains two expansions:
+
+```
+┌─ Plate ENP ───────────────────────────────────────┐
+│ Plate ENP @ Tank #3 · 30 min · 180-200°F           │
+│                                                    │
+│ ▸ 📋 Instructions  (using library default)         │
+│ ▸ ⚙ Measurements   (5/5 collected)                 │
+└────────────────────────────────────────────────────┘
+```
+
+### Instructions expansion
+
+- Source toggle: **"Library default"** vs **"Custom for this recipe"**
+- Rich-text editor showing current text (library default if recipe override empty)
+- **[Use library default]** / **[Save override]** buttons
+- Badge on step card: **"📋 default"** vs **"📋 custom"**
+
+### Measurements expansion
+
+- Master toggle: **"Collect measurements at this step"**
+- Editable list of prompts with: drag handle, collect checkbox, name, input type, target range, unit, required toggle
+- **[+ Add custom prompt]** to append a recipe-only prompt
+- **[Reset to library defaults]** button
+- Badge on step card: **"5/5 collected"** (green), **"3/5 collected"** (amber), **"No measurements"** (grey)
+
+## "Add Common Audit Fields" One-Click Action
+
+New button on `fp.step.template` form: `action_add_common_audit_fields`. Idempotently appends:
+
+- Operator Initials (signature, required)
+- Bath ID (text)
+- Photo on Failure (photo, optional, hint="upload only if failure observed")
+- Equipment ID (text)
+
+Skip rows whose name already exists. Logs to chatter.
+
+## Runtime Wiring
+
+| Component | Change |
+|---|---|
+| `fp.job.step.input.wizard` `default_get` | Filter `recipe_node.input_ids` to `kind == 'step_input' AND collect == True`. If `recipe_node.collect_measurements == False`, return empty `line_ids`. |
+| `fp.job.step.input.wizard.line.input_type` | Mirror the 4 new input types so the wizard form can render per-type widgets |
+| `fp.job.step.input.wizard_views.xml` | Conditional widgets per input type (photo → image binary; multi_point_thickness → 5-cell row + avg; bath_chemistry_panel → 4-cell group; ph → number with [0,14]) |
+| `fusion_plating_shopfloor` tablet QC checklist OWL | Same per-type rendering on tablet |
+| `fp.job.step.move` | No schema change — JSON `input_data` field already accepts arrays/dicts; just confirm encoding round-trips for the new types |
+| Snapshot-copy logic (library → recipe node) | Verify `template_input_id` link is set; verify all fields including new types copy verbatim |
+| `_fp_recipe_to_job` (MO/job creation) | Verify `collect`, `collect_measurements`, `template_input_id` carry through to `fp.job.step.recipe_node_id` chain |
+
+## CoC / Audit Report Rendering
+
+`fusion_plating_reports/views/report_coc_chronological.xml`:
+
+1. Filter rendered inputs to `collect == True` only.
+2. Render branches for new input types:
+   - `photo` → thumbnail `<img>` from `ir.attachment`, fallback to `[photo: filename]` if attachment missing
+   - `multi_point_thickness` → `R1: x, R2: y, R3: z, R4: a, R5: b → avg M`
+   - `bath_chemistry_panel` → 4 labelled rows (pH, conc, temp, bath ID)
+   - `ph` → `pH X.XX`
+3. Skip prompts where the recipe author opted out (`collect=False`) — don't render them as "(not collected)" since auditors only care about what WAS measured.
+
+## Migration
+
+Single migration script: `fusion_plating/migrations/19.0.18.7.0/post-migrate.py`
+
+1. Default `collect=True` on all existing `fusion.plating.process.node.input_ids` rows.
+2. Default `collect_measurements=True` on all existing `fusion.plating.process.node` rows.
+3. For each existing `fp.step.template`, re-run `action_seed_default_inputs` (idempotent — adds new defaults without clobbering manual edits).
+4. Backfill `template_input_id` on recipe-node inputs by name-matching against the linked library template's inputs (best-effort; rows that don't match stay as `False` and become "custom prompts" for purposes of reset-to-defaults).
+
+Seed data file: `fusion_plating/data/fp_step_template_data.xml` (`noupdate="1"`) — one example template per new Step Kind so users see populated entries on upgrade.
+
+## Edge Cases
+
+1. **Recipe node with empty `description`** — runtime renders the linked library template's `description` (fall-through). If both empty, instructions section is hidden in the operator wizard.
+2. **Recipe author opts out of all prompts but leaves `collect_measurements=True`** — wizard fires with zero rows; UX gives "no inputs to record, mark done?" confirmation. Same as today's behaviour for kinds with no defaults (rinse, dry, gating).
+3. **Photo input on operation measurement (new) vs transition input (existing)** — both kinds always store the image as an `ir.attachment` linked to the `fp.job.step.move` row (never as inline base64 in the `input_data` JSON, to keep the payload small and indexable). Distinguish operation vs transition by `kind` field on the prompt row. CoC report iterates both kinds and renders thumbnails.
+4. **Multi-point thickness validation** — at least one reading required when `required=True`; average computed over **non-empty cells only** (empty = "didn't measure that point"); when the computed average falls outside `[target_min, target_max]` the wizard shows a non-blocking warning banner before commit (operator can override and proceed, but the out-of-band condition is recorded on the move for QC review).
+5. **Bath chemistry panel — partial fill** — auditor wants to know which fields were captured; all four fields stored in the JSON payload as separate keys. Empty values render as "—" in the CoC.
+6. **Reset to library defaults** — preserves rows where `template_input_id = False` (recipe-author-added custom prompts). Re-enables `collect=True` on rows where `template_input_id` is set. Logs to chatter with diff summary.
+7. **Library template renamed** — recipe nodes already snapshotted; `template_input_id` link survives the rename. "Reset to defaults" pulls the renamed prompt back.
+8. **Library prompt deleted** — recipe nodes' `template_input_id` becomes a dangling reference; reset-to-defaults treats those as "deleted upstream, leave as recipe custom" (don't drop them — recipe author may still want them).
+9. **Existing recipes upgrading** — the migration sets `collect=True` everywhere, so behaviour is unchanged for existing data. Only newly-disabled prompts (post-upgrade) suppress at runtime.
+
+## Battle Test Plan
+
+Build `fusion_plating/scripts/bt_step_library_audit.py` exercising every change. Same `bt_s*.py` pattern as `fusion_plating_quality/scripts/`. Runs in odoo-shell against the live entech DB after deploy. Reports PASS / FAIL / SKIP per assertion, summary counts at the end.
+
+| # | Assertion |
+|---|---|
+| 1 | Every new Step Kind has at least 1 seed template loaded |
+| 2 | Every Step Kind (new + existing) yields the expected default inputs after `action_seed_default_inputs` runs on a fresh template |
+| 3 | Library → recipe drag snapshot-copies every input field including the 4 new types |
+| 4 | `template_input_id` link is set on snapshot-copied inputs |
+| 5 | Recipe → job step inheritance preserves `collect`, `collect_measurements`, custom prompts |
+| 6 | Operator wizard at runtime filters to `collect=True` only |
+| 7 | Master `collect_measurements=False` skips the wizard entirely |
+| 8 | Adding a custom prompt to a recipe node (no `template_input_id`) survives reset-to-defaults |
+| 9 | Reset-to-defaults re-enables opted-out library prompts and pulls in newly-added library prompts |
+| 10 | Each new input type stores and round-trips through `fp.job.step.move.input_data` (JSON) |
+| 11 | Multi-point thickness average computed correctly (incl. edge case of 1 reading) |
+| 12 | Photo attachment lands in `ir.attachment` and links to the move row |
+| 13 | CoC chronological report renders each new input type without errors |
+| 14 | CoC excludes `collect=False` rows |
+| 15 | Operator instructions render at runtime — recipe override beats library default; empty override falls back to library |
+| 16 | "Add Common Audit Fields" one-click is idempotent (run twice, no duplicates) |
+| 17 | `action_seed_default_inputs` is idempotent after manual edits (user-edited rows survive re-seed) |
+| 18 | `description` on recipe node clears correctly via "Use library default" toggle |
+
+## Files Touched
+
+| File | Change |
+|---|---|
+| `fusion_plating/models/fp_step_template.py` | Extend `default_kind` Selection, extend `DEFAULT_INPUTS_BY_KIND`, add `action_add_common_audit_fields` |
+| `fusion_plating/models/fp_step_template_input.py` | Add 4 input types to selection |
+| `fusion_plating/models/fp_process_node.py` | Add `collect_measurements` on node; add `collect` + `template_input_id` on inline input model; mirror new input types |
+| `fusion_plating/models/fp_process_node_inherit.py` | If applicable for filtering helpers |
+| `fusion_plating/views/fp_step_template_views.xml` | Add "Add Common Audit Fields" button; relabel `description` to "Default Operator Instructions" |
+| `fusion_plating/data/fp_step_template_data.xml` | NEW — seed templates for the 8 new kinds |
+| `fusion_plating/migrations/19.0.18.7.0/post-migrate.py` | NEW — backfill `collect`, `collect_measurements`, `template_input_id`; re-run `action_seed_default_inputs` |
+| `fusion_plating/static/src/js/simple_recipe_editor.js` | Render Instructions + Measurements expansions; collect badge; reset-to-defaults action |
+| `fusion_plating/static/src/xml/simple_recipe_editor.xml` | Templates for new affordances |
+| `fusion_plating/static/src/scss/simple_recipe_editor.scss` | Styles for expansions and badges |
+| `fusion_plating/controllers/simple_recipe_controller.py` | New endpoints: `/fp/simple_recipe/step/toggle_collect`, `/fp/simple_recipe/step/edit_input`, `/fp/simple_recipe/step/edit_instructions`, `/fp/simple_recipe/step/reset_to_library` |
+| `fusion_plating_jobs/wizards/fp_job_step_input_wizard.py` | Filter to `collect=True` only; mirror new input types |
+| `fusion_plating_jobs/wizards/fp_job_step_input_wizard_views.xml` | Conditional widgets per input type |
+| `fusion_plating_shopfloor/static/src/...` (tablet QC checklist OWL) | Per-type rendering on tablet |
+| `fusion_plating_reports/views/report_coc_chronological.xml` | Render branches for new types; filter to `collect=True` |
+| `fusion_plating/scripts/bt_step_library_audit.py` | NEW — battle-test script |
+| `fusion_plating/__manifest__.py` | Bump version to `19.0.18.7.0` |
+| `fusion_plating_jobs/__manifest__.py` | Bump version |
+| `fusion_plating_reports/__manifest__.py` | Bump version |
+
+## Effort Estimate
+
+6–8 working days. Roughly 60% backend (models, migrations, wizard filtering, CoC, battle test) and 40% frontend (OWL editor expansions, per-input-type widgets in wizard + tablet).
+
+## Out of Scope (Defer)
+
+- IoT/sensor auto-fill of measurements
+- Customer portal display of recorded values
+- Step Kinds beyond the 8 listed (deburring, anodize seal, abrasive blasting)
+- Replacing the existing tablet QC checklist OWL component
+- Per-customer or per-part override of step measurements
+- Notification/email when audit-required values are missing post-completion