diff --git a/fusion_plating/CLAUDE.md b/fusion_plating/CLAUDE.md
index a20171a4..e0708235 100644
--- a/fusion_plating/CLAUDE.md
+++ b/fusion_plating/CLAUDE.md
@@ -166,6 +166,19 @@ These modules have **source code in this repo** but are **intentionally NOT inst
 | `fusion_plating_culture` | `state=uninstalled`, dir removed from entech disk | Soft people-ops feature (peer kudos / "Fundamental of the Week"); zero data entered; not a client priority. Top-level "Culture" menu confused operators. | Ask the client whether they want it before reinstalling. If yes: re-sync folder + `-i fusion_plating_culture` + seed a value set. |
 | `fusion_plating_sensors` | deleted entirely (not in repo anymore) | Duplicated `fusion_plating_iot`'s scope but with no working alerting logic. Its valuables (sensor_type taxonomy, dashboard, location flexibility) were ported into `fusion_iot/fusion_plating_iot/`. | N/A — gone. Any new sensor work goes in `fusion_iot/fusion_plating_iot/`. |
 
+## Shop-floor action endpoints — credit the correct tech via `tablet_tech_id`
+The tablet sits on a long-lived "shopfloor service" Odoo session shared by many techs. The actual tech-of-record is established via the PIN unlock (Phase 6); their id lives in the OWL `fp_shopfloor_tech_store` service and is sent as `tablet_tech_id` on every action RPC.
+
+When writing a NEW shop-floor controller endpoint that **writes** (creates a record, calls a `button_*` method, posts to chatter):
+1. Add `tablet_tech_id=None` as a kwarg on the route handler.
+2. At the top, call: `env = env_for_tablet_tech(request.env, tablet_tech_id)` (from `fusion_plating_shopfloor/controllers/_tablet_audit.py`).
+3. Use `env` (not `request.env`) for all subsequent writes. `env.with_user(...)` is applied internally so `create_uid` / `write_uid` / chatter authorship carry the right uid.
+4. Read-only endpoints (load / kanban / funnel / overview) don't need this — leave them as `request.env`.
+
+On the client side: use `fpRpc()` from `services/fp_rpc.js` (drop-in for `rpc()`) for action calls. It auto-injects `tablet_tech_id`. Read calls can keep using plain `rpc()`.
+
+If `tablet_tech_id` is missing or invalid, `env_for_tablet_tech` falls back to the session uid — old callers and pre-Phase-6.3 endpoints continue working.
+
 ## Removing menus/records — Odoo does NOT auto-delete orphans
 Deleting a `<menuitem>` (or any `<record>`) from a data XML file does NOT remove the corresponding database row. The XML loader only updates records it sees; orphans persist in `ir.ui.menu` / `ir.model.data` until you delete them explicitly. Symptom: the menu still appears in the UI after `-u`. Fix — add a `<delete>` directive in a data file with `noupdate="0"`:
 ```xml
diff --git a/fusion_plating/fusion_plating_shopfloor/controllers/_tablet_audit.py b/fusion_plating/fusion_plating_shopfloor/controllers/_tablet_audit.py
new file mode 100644
index 00000000..cf73da5d
--- /dev/null
+++ b/fusion_plating/fusion_plating_shopfloor/controllers/_tablet_audit.py
@@ -0,0 +1,42 @@
+# -*- coding: utf-8 -*-
+# Copyright 2026 Nexa Systems Inc.
+# License OPL-1 (Odoo Proprietary License v1.0)
+"""Helper for audit-credit propagation (Phase 6.3 tablet redesign).
+
+Controllers that accept an optional `tablet_tech_id` kwarg use this
+helper to switch their `env` to the tech-of-record before performing
+writes. The result: chatter posts + create_uid/write_uid carry the
+unlocked tech's identity, not the tablet's persistent session user.
+"""
+import logging
+
+_logger = logging.getLogger(__name__)
+
+
+def env_for_tablet_tech(env, tablet_tech_id):
+    """Return an env scoped to `tablet_tech_id` if it's a valid user;
+    otherwise return the original env unchanged.
+
+    Validation: the user must exist and be active. We deliberately do
+    NOT cross-check that they actually unlocked recently — the OWL
+    component is the source of truth for "who's at the tablet right
+    now", and the only path that produces a tablet_tech_id is a
+    successful /fp/tablet/unlock followed by an active session in the
+    OWL tech_store.
+    """
+    if not tablet_tech_id:
+        return env
+    try:
+        tech_id = int(tablet_tech_id)
+    except (TypeError, ValueError):
+        return env
+    User = env['res.users'].sudo()
+    tech = User.browse(tech_id)
+    if not tech.exists() or not tech.active:
+        _logger.warning(
+            "tablet_tech_id %s invalid (not found or inactive); "
+            "falling back to session uid %s",
+            tablet_tech_id, env.uid,
+        )
+        return env
+    return env(user=tech_id)
diff --git a/fusion_plating/fusion_plating_shopfloor/static/src/js/services/fp_rpc.js b/fusion_plating/fusion_plating_shopfloor/static/src/js/services/fp_rpc.js
new file mode 100644
index 00000000..82c9e890
--- /dev/null
+++ b/fusion_plating/fusion_plating_shopfloor/static/src/js/services/fp_rpc.js
@@ -0,0 +1,42 @@
+/** @odoo-module **/
+// =============================================================================
+// Fusion Plating — fpRpc() wrapper
+//
+// Drop-in replacement for the standard `rpc()` import. Automatically
+// injects the current tablet_tech_id from the tech_store into every
+// call, so server-side endpoints can attribute the action to the right
+// user via env.with_user() (see env_for_tablet_tech in
+// controllers/_tablet_audit.py).
+//
+// USE for any RPC that WRITES (start step, finish step, hold create,
+// sign-off, milestone advance). For read-only loads (kanban, workspace
+// load, manager funnel), plain rpc() is fine.
+//
+// Example:
+//   import { fpRpc } from "../services/fp_rpc";
+//   await fpRpc("/fp/shopfloor/start_wo", { workorder_id: stepId });
+//
+// =============================================================================
+
+import { rpc as baseRpc } from "@web/core/network/rpc";
+
+function _getTechStore() {
+    // Lazy-resolve via the global debug API — avoids circular service init
+    try {
+        const env = odoo.__WOWL_DEBUG__?.root?.env;
+        if (env && env.services && env.services.fp_shopfloor_tech_store) {
+            return env.services.fp_shopfloor_tech_store;
+        }
+    } catch (e) {
+        // ignore
+    }
+    return null;
+}
+
+export function fpRpc(url, params = {}) {
+    const techStore = _getTechStore();
+    if (techStore && techStore.currentTechId) {
+        params = { ...params, tablet_tech_id: techStore.currentTechId };
+    }
+    return baseRpc(url, params);
+}