diff --git a/scripts/check-skills-token-ratchet.mjs b/scripts/check-skills-token-ratchet.mjs
index dc50a8cacfb..fe4c35991cb 100644
--- a/scripts/check-skills-token-ratchet.mjs
+++ b/scripts/check-skills-token-ratchet.mjs
@@ -421,7 +421,27 @@ export const CEILINGS = new Map([
   // decision tables at 487 lines.
   // 5833 -> 5828: A2′ — the release-stamp line left the count (see
   // STAMP_LINE_REPIN); the file's count fell by the same 5, headroom unchanged.
-  ['skills/objectstack-platform/SKILL.md', 5828],
+  // 5828 -> 5981 (card #26302, the objectstack-platform row of the skills gap
+  // audit): the Seed Data section gains `demoStaff` against `devLogins` — a
+  // seed deals records to people and cannot create one, so the people are
+  // declared in `demoStaff` and `os dev` creates the accounts (position and
+  // permission sets from the stack's own declarations, the seed password, never
+  // in the built artifact), while `devLogins` is banner text that creates and
+  // grants nothing. Maintainer ruling 2026-10-27 on the seat's decision card
+  // 「skills 修复卡的教学和 eval 都撞 token 天花板,怎么付?」, his tap verbatim
+  // and untranslated: 「A:先削重复,余额按实测提高」. Paid down first, as the
+  // ruling asks — four restatements cut, each with a surviving home in the
+  // file: the `defineStack()` intro (the opening paragraph and the project
+  // tree say it), the "read the source for the exact shape" paragraph (the
+  // References section keeps the rule; one pointer line stays), the boot
+  // sequence's "(see Ports & networking)" aside and the two cheat-sheet port
+  // comments (the Port resolution paragraph says both). Arithmetic in bytes:
+  // on `origin/main` the priced text was 23294 bytes (5824 tokens, headroom 4);
+  // the cuts remove 309 bytes and the section adds 939, so the LANDED priced
+  // text is 23924 bytes -> 5981 tokens: the 4 tokens of headroom are absorbed
+  // and the ceiling moves 5828 -> 5981 (+153). Pinned AT the measurement.
+  //   ceil(($(wc -c < skills/objectstack-platform/SKILL.md) - 20) / 4) == ceil(23924 / 4)
+  ['skills/objectstack-platform/SKILL.md', 5981],
   // `skills/objectstack-pm-dispatch/SKILL.md` (9708) and its
   // `rules/dev-template.md` (1838) left this table on 2026-09-10 with the files:
   // the maintainer deleted the published PM skill whole (verbatim:
@@ -724,7 +744,17 @@ export const CEILINGS = new Map([
   // is the whole addition; pinned AT the measurement, zero headroom. The
   // raising PR's body carries the same arithmetic.
   ['skills/objectstack-i18n/evals/bundles-locales-coverage.json', 1451],
-  ['skills/objectstack-platform/evals/config-plugins-ops.json', 1211],
+  // 1211 -> 1458 (card #26302): one eval for a demo whose seed names people —
+  // expected: both in `demoStaff` with a declared `position` /
+  // `permissionSets`, created by `os dev`; NO `role:` alias and NO platform
+  // set such as `admin_full_access`. Same ruling as the `SKILL.md` row above
+  // (2026-10-27, tap A: 「A:先削重复,余额按实测提高」); the file's six fixtures
+  // share no sentence, so there was no duplicate to cut (0 bytes). On
+  // `origin/main` the file was 4842 bytes (1211 tokens, headroom 0); the
+  // fixture adds +989 bytes, so the LANDED file is 5831 bytes -> 1458 tokens,
+  // ceiling +247, pinned AT the measurement.
+  //   ceil($(wc -c < skills/objectstack-platform/evals/config-plugins-ops.json) / 4) == ceil(5831 / 4)
+  ['skills/objectstack-platform/evals/config-plugins-ops.json', 1458],
   ['skills/objectstack-query/evals/filters-pagination-search.json', 955],
   // 1505 -> 1789 (#26295): two eval prompts — list grouping with `orderBy`, and the copy hole
   // + `onSuccess` pair — +284 tokens in the file's shape; fixtures, nothing to delete, the
diff --git a/skills/objectstack-platform/SKILL.md b/skills/objectstack-platform/SKILL.md
index 4979af2ac36..4a212db40b3 100644
--- a/skills/objectstack-platform/SKILL.md
+++ b/skills/objectstack-platform/SKILL.md
@@ -33,9 +33,6 @@ development** (plugins, services, kernel hook / event handlers,
 
 ## `defineStack()` — The Core Configuration
 
-`objectstack.config.ts` is the single entry point for every project.
-It calls `defineStack()` to declare all metadata.
-
 → Moved verbatim to [references/bootstrap.md](./references/bootstrap.md) § Minimal Example.
 
 ### Full Configuration Reference
@@ -78,11 +75,9 @@ keeping straight:
   scheduled migration, so a key that only warns today is expected to be
   refused later.
 
-For the exact Zod shape — including which keys are optional and what types
-the collection items take — read
-`node_modules/@objectstack/spec/src/stack.zod.ts`
-(`ObjectStackDefinitionSchema`). Each collection's item shape lives in
-its own domain folder (`data/object.zod.ts`, `ui/view.zod.ts`, …).
+Exact shape: `ObjectStackDefinitionSchema` in
+`node_modules/@objectstack/spec/src/stack.zod.ts`; each collection's item
+schema sits in its domain folder (`data/object.zod.ts`, `ui/view.zod.ts`, …).
 
 → Moved verbatim to [references/bootstrap.md](./references/bootstrap.md) § Map Format (Key → Name) · § Barrel Import Pattern.
 
@@ -348,7 +343,7 @@ CLI: `os serve` / `os dev`
      ├── DispatcherPlugin
      └── AIServicePlugin (cloud / EE only — reverse-mounted by a cloud host; absent in the open framework per cloud ADR-0025)
   5. Runtime.start() → init + start all plugins
-  6. Server listens on the resolved port (see "Ports & networking" in Part 3)
+  6. Server listens on the resolved port
 ```
 
 **Port resolution** (both `os dev` and `os start` → `os serve`):
@@ -445,6 +440,26 @@ definition: never write it by hand, and never hand-write a raw
 | `ignore` | Insert if not exists, skip otherwise |
 | `replace` | ⚠️ **Data loss** — drops and re-inserts all records |
 
+### Demo accounts — `demoStaff` vs `devLogins`
+
+A seed deals records to people (`owner_id: 'Legal Counsel 1'`) but cannot
+create one: a `sys_user` row in `data` is refused (ADR-0092). Declare the
+people in `demoStaff`; `os dev` creates each account after the development
+admin, signing in with the seed password (`--admin-password`, default
+`admin123`) — an entry carries no `password`:
+
+```typescript
+demoStaff: [{ name: 'Legal Counsel 1', email: 'counsel1@example.com',
+  position: 'legal_counsel', permissionSets: ['contracts_editor'] }],
+```
+
+`name` is what a seed reference resolves by; `position` / `permissionSets`
+name only what this stack declares (a platform set such as
+`admin_full_access` is refused); `os build` drops the key and a non-dev boot
+creates nothing. `devLogins` creates and grants nothing — it only prints an
+existing account on the boot banner. Pick `demoStaff` whenever the demo
+needs an account to exist.
+
 ---
 
 ## CLI Commands
@@ -455,12 +470,12 @@ Cheat sheet for the bootstrap loop:
 ```bash
 npx create-objectstack my-app
 cd my-app && npm install
-os dev --ui          # dev server + Console at /_console/ (auto-hops port if taken)
+os dev --ui          # dev server + Console at /_console/
 os validate          # metadata cross-reference checks
 os compile           # produce dist/ artifact
 os migrate plan      # preview metadata↔DB schema drift (additive sync never alters existing columns)
 os migrate apply     # reconcile DB to metadata (loosening only; --allow-destructive for drops/tightenings)
-PORT=8080 os start   # production — pin the port explicitly (see Ports & networking)
+PORT=8080 os start   # production — pin the port explicitly
 ```
 
 ---
diff --git a/skills/objectstack-platform/evals/config-plugins-ops.json b/skills/objectstack-platform/evals/config-plugins-ops.json
index a114aa80a0e..b5c9dca96cd 100644
--- a/skills/objectstack-platform/evals/config-plugins-ops.json
+++ b/skills/objectstack-platform/evals/config-plugins-ops.json
@@ -60,6 +60,16 @@
         "must_contain": ["os start", "PORT", "OS_TRUSTED_ORIGINS", "driver-sql"],
         "must_not_contain": ["new DriverPlugin", "@objectstack/plugin-prometheus"]
       }
+    },
+    {
+      "id": 7,
+      "prompt": "Prepare a demo of our contracts app: the seed data assigns matters to 'Legal Counsel 1' and 'Paralegal 1', and the demo should open signed in as Legal Counsel 1.",
+      "expected_output": "Both people go in `demoStaff` — `name` exactly as the seed references them, `email`, and a `position` / `permissionSets` the stack itself declares — and `os dev` creates the accounts with the seed password (`admin123` by default): no `password` key, no `role:` alias, no platform set such as `admin_full_access`, and no hand-written `sys_user` seed row (refused). `devLogins` creates nothing: at most one entry naming Legal Counsel 1's address so the boot banner prints it. Notes that `os build` drops `demoStaff` and a production boot creates no demo account.",
+      "files": [],
+      "assertions": {
+        "must_contain": ["demoStaff", "position", "permissionSets", "os dev"],
+        "must_not_contain": ["role:", "admin_full_access"]
+      }
     }
   ]
 }