diff --git a/.claude/ralph-loop.local.md b/.claude/ralph-loop.local.md
new file mode 100644
index 0000000..a336f9d
--- /dev/null
+++ b/.claude/ralph-loop.local.md
@@ -0,0 +1,21 @@
+---
+active: true
+iteration: 1
+session_id: b236681f-560d-497b-aa7d-07eab42bba2b
+max_iterations: 12
+completion_promise: "HEUREKA"
+workplan_id: EANCH-WP-0001
+workplan_file: workplans/EANCH-WP-0001-intent-placeholder.md
+started_at: "2026-07-08T18:31:44Z"
+---
+
+Read the workplan at `workplans/EANCH-WP-0001-intent-placeholder.md`.
+
+If every task has `status: done` AND frontmatter `status: done`:
+run `rm -f .claude/ralph-loop.local.md` first (deactivates the loop so the stop hook exits cleanly),
+then output <promise>HEUREKA</promise>.
+
+Otherwise implement the next `todo` task as described in the workplan.
+Set task `in_progress` when starting, `done` when complete.
+When all tasks are done set frontmatter `status: done`.
+
diff --git a/README.md b/README.md
index c298f8e..eabce3d 100644
--- a/README.md
+++ b/README.md
@@ -1,16 +1,82 @@
 # evidence-anchor
 
 Selector creation, resolution, and the `DocumentViewerAdapter` contract that
-every document viewer in the workspace implements.
+every document viewer in the citation-evidence workspace implements. This repo
+turns annotations from static marks into durable, reopenable source references.
 
-## MVP status: INTENT only
+- **Owns:** selector *behavior* — `createSelectors`, `resolveSelectors`, PDF
+  selector math, the viewer-adapter contract, and highlight/scroll helpers.
+- **Does not own:** selector *type interfaces* — those live in `citation-engine`
+  (`shared/selector`). See `ADR-0006` and `SharedContracts.md` §8.
+- **May depend on:** `citation-engine` only (DependencyMap §4). Nothing from
+  `binder/`, `source/`, or `work/` may flow back into it.
 
-During the citation-evidence MVP, code lives upstream in
-[`citation-evidence`](../citation-evidence/) under `src/anchor/`. This repo
-currently holds `INTENT.md` describing what will move here. Contract
-changes belong in
-[`citation-evidence/wiki/SharedContracts.md`](../citation-evidence/wiki/SharedContracts.md),
-not here.
+See `SCOPE.md` for the boundary and `INTENT.md` for the long-range intent.
 
-Per the dependency map, anchor depends on `shared/` and `engine/` only;
-nothing in `binder/`, `source/`, or `work/` may flow back into it.
+## Status: extracting from the umbrella
+
+The concrete anchor slice currently lives upstream in
+[`../citation-evidence/src/anchor/`](../citation-evidence/src/anchor/). Workplan
+`EANCH-WP-0001` moves it here as a standalone TypeScript package, wires the
+umbrella to consume this package, and verifies the round-trip. Shared-contract
+changes still happen in the umbrella (`citation-evidence/wiki/`), not here.
+
+## Install model
+
+Sibling-checkout, linked-package model — this repo is checked out next to its
+consumers and consumed via a local link (e.g. `link:../evidence-anchor`), not
+published to a registry during MVP. Its only shared-type dependency is
+`citation-engine`, imported through the engine's public `shared` entrypoint
+(`@citation-evidence/engine/shared`) rather than umbrella-only `@shared/*`
+aliases.
+
+## Package layout (initial extracted version)
+
+```text
+src/
+  index.ts                      public entrypoint (re-exports the surfaces below)
+  types.ts                      adapter-side types: SelectionCapture,
+                                ResolvedAnchorTarget, AnchorResolution,
+                                HighlightRenderOptions, DocumentViewerAdapter
+  selectors/
+    index.ts                    createSelectors, resolveSelectors, DEFAULT_CONTEXT_CHARS
+    create.ts                   selector creation from a captured selection
+    resolve.ts                  resolution + the exact-match confidence ladder
+    create.test.ts
+    resolve.test.ts
+  pdf/
+    pdf-selector-math.ts        page number + normalized page-rectangle math
+    pdf-selector-math.test.ts
+    pdf-viewer-adapter.tsx      concrete PDF DocumentViewerAdapter (from the spike)
+  highlight/
+    scroll-job.ts               scroll-to-target helper
+    scroll-job.test.ts
+    highlight-styles.css        highlight rendering styles
+    debug-textlayer.css         optional text-layer debugging styles
+```
+
+Boundary rules for the layout:
+
+- viewer-library imports (`pdfjs`, `react-pdf-highlighter-plus`) are confined to
+  `src/pdf/` — they never appear on `types.ts` or on the public surface;
+- `src/selectors/` is pure (no viewer/UI deps) and depends only on
+  `citation-engine` shared types;
+- the public entrypoint re-exports the stable surface consumers rely on:
+  `createSelectors`, `resolveSelectors`, the selector/resolution types, the
+  `DocumentViewerAdapter` contract, and the PDF adapter.
+
+## Public API (target surface)
+
+```ts
+import {
+  createSelectors,
+  resolveSelectors,
+  type DocumentViewerAdapter,
+  type AnchorResolution,
+} from "evidence-anchor";
+```
+
+Resolution is explicit about uncertainty — `AnchorResolution.status` is one of
+`resolved` / `ambiguous` / `unresolved` / `stale` with a `0..1` confidence, so a
+caller can highlight, ask the user to confirm, or mark a citation stale rather
+than silently highlight the wrong passage.
diff --git a/SCOPE.md b/SCOPE.md
index d48e39a..59af1ce 100644
--- a/SCOPE.md
+++ b/SCOPE.md
@@ -8,130 +8,143 @@
 
 ## One-liner
 
-<!-- Describe the purpose of this repository in one precise sentence. -->
-<!-- Example: "Provides a lightweight event router for Kubernetes-native systems." -->
+Selector creation, resolution, re-anchoring, and highlight/scroll contracts that
+keep citation-evidence annotations attached to their source passages.
 
 ---
 
 ## Core Idea
 
-<!-- What is the main capability or idea behind this repository? -->
-<!-- What problem does it try to solve? -->
+An **anchor** is a resolvable reference to a passage in a document, represented
+by several complementary *selectors* (visual, text, structural, context). Given
+a stored selector set and a document representation, this repo answers: *where is
+this passage now, and how confident are we?* — returning a confidence-scored
+result (`resolved` / `ambiguous` / `unresolved` / `stale`) rather than a silent
+guess. It also owns the `DocumentViewerAdapter` contract every viewer implements.
 
 ---
 
 ## In Scope
 
-<!-- What this repository is responsible for. -->
-<!-- Be explicit and concrete. -->
+- selector **creation** from a captured viewer selection (`createSelectors`)
+- selector **resolution** against a document representation (`resolveSelectors`)
+- the exact-match confidence ladder and selector-redundancy rules
+- PDF selector math (page number + normalized page rectangles, page-local text)
+- the format-neutral `DocumentViewerAdapter` contract and the first PDF adapter
+- scroll-to-target and highlight-render contracts + helpers
+- anchor confidence scoring and ambiguous/unresolved/stale reporting
 
--
--
--
+Selector *behavior* lives here; selector *type interfaces* live in
+`citation-engine` (see ADR-0006 and SharedContracts §8).
 
 ---
 
 ## Out of Scope
 
-<!-- What this repository deliberately does NOT do. -->
-<!-- This is often more important than "In Scope". -->
+- selector *type definitions* — owned by `citation-engine` (`shared/selector`)
+- persistence policy, the canonical evidence domain model, citation-card rendering
+- document ingestion, OCR, metadata extraction, external source lookup
+- form-field binding semantics, guide-overlay UI, application shell / deployment
+- becoming a viewer implementation itself (it defines the adapter, not the viewer)
 
--
--
--
+During the umbrella-first MVP these belong to the appropriate citation-evidence
+subsystem. This repo may depend on **`citation-engine` only** (DependencyMap §4).
+
+### Not in this extraction slice (EANCH-WP-0001)
+
+- full HTML/Markdown (`DomSelectionCapture`) selector implementation
+- production-grade fuzzy / recovery-oriented re-anchoring
+- `stale` and orphaned-annotation semantics beyond what upstream already ships
+
+These are real INTENT.md goals but are **registered as follow-on work**, not
+built during the initial extract-and-verify pass.
 
 ---
 
 ## Relevant When
 
-<!-- When should someone consider using or exploring this repository? -->
-
--
--
--
+- creating anchors from a user text selection in a document viewer
+- resolving stored selectors back into a representation to reopen a citation
+- implementing a new `DocumentViewerAdapter` (PDF today; HTML/Markdown later)
+- scrolling to and highlighting a cited passage
 
 ---
 
 ## Not Relevant When
 
-<!-- When should someone ignore this repository? -->
-
--
--
--
+- you need selector *type* shapes only — import from `citation-engine`
+- you are working on ingestion, persistence, binding, or the app shell
+- you need the integrated review workspace UX — that is `citation-work` / umbrella
 
 ---
 
 ## Current State
 
-<!-- Rough indication of maturity. No strict format required. -->
-
-- Status: <!-- e.g. concept / experimental / active / stable / deprecated -->
-- Implementation: <!-- e.g. idea / partial / substantial / complete -->
-- Stability: <!-- e.g. unstable / evolving / stable -->
-- Usage: <!-- e.g. none / personal / internal / production -->
-
-<!-- Add any notes that help set expectations. -->
+- Status: experimental — extracting from the umbrella into a standalone package
+- Implementation: partial — pure selector + PDF adapter slice exists upstream in
+  `../citation-evidence/src/anchor/`; extraction tracked by EANCH-WP-0001
+- Stability: evolving — shared contracts stable, this repo's package API forming
+- Usage: internal (consumed by `citation-evidence` during MVP)
 
 ---
 
 ## How It Fits
 
-<!-- Where does this repository sit in the bigger picture? -->
-
-- Upstream dependencies:
-- Downstream consumers:
-- Often used with:
+- Upstream dependencies: `citation-engine` (shared selector/document/annotation types)
+- Downstream consumers: `citation-evidence` (umbrella), later `citation-work`,
+  `evidence-source`, `evidence-binder`
+- Often used with: a concrete document viewer (PDF.js + react-pdf-highlighter-plus)
 
 ---
 
 ## Terminology
 
-<!-- Terms that are important to understand this repo. -->
-<!-- Especially useful if naming differs from other repos. -->
-
-- Preferred terms:
-- Also known as:
-- Potentially confusing terms:
+- Preferred terms: anchor, selector, resolution, re-anchoring, highlight contract
+- Also known as: "the anchoring layer"
+- Potentially confusing terms: `Selector` (the *type* is engine-owned; the
+  *behavior* is anchor-owned — see ADR-0006)
 
 ---
 
 ## Related / Overlapping Repositories
 
-<!-- List repositories that have similar or adjacent responsibilities. -->
-<!-- Helps detect duplication and navigate the ecosystem. -->
-
-- <repo-name> — <!-- how it relates -->
+- `citation-engine` — owns shared selector/document/annotation type interfaces
+- `citation-evidence` — umbrella; current home of the code being extracted
+- `evidence-source` — document ingestion / representations (consumer)
+- `citation-work` — review workspace UX (consumer)
+- `evidence-binder` — evidence-to-target binding (consumer)
 
 ---
 
 ## Getting Oriented
 
-<!-- If someone decides to look deeper, where should they start? -->
-
-- Start with:
-- Key files / directories:
-- Entry points:
+- Start with: `INTENT.md` (intended responsibilities), then this file
+- Key files / directories: upstream `../citation-evidence/src/anchor/` is the
+  extraction source; post-extraction the package layout is in `README.md`
+- Entry points: `createSelectors`, `resolveSelectors`, `DocumentViewerAdapter`
 
 ---
 
 ## Provided Capabilities
 
-<!-- What can this repo's domain provide to other domains on request? -->
-<!-- Each capability block is parsed by the state-hub capability catalog ingest. -->
-<!-- Remove the examples and add your own, or leave empty if none. -->
-
-<!--
 ```capability
-type: infrastructure
-title: Example capability title
-description: What this capability provides, in one or two sentences.
-keywords: [keyword1, keyword2, keyword3]
+type: library
+title: Durable citation anchoring (selectors + resolution)
+description: Create redundant selectors for a document passage and resolve them back into a representation with a confidence-scored result, so citations survive zoom, re-render, and light source edits.
+keywords: [anchor, selector, resolution, citation, highlight, pdf]
+```
+
+```capability
+type: interface
+title: DocumentViewerAdapter contract
+description: A format-neutral viewer adapter contract (selection capture, selector creation, resolution, scroll-to-target, highlight render) that any document viewer implements; PDF adapter provided first.
+keywords: [viewer, adapter, highlight, scroll, pdf, contract]
 ```
--->
 
 ---
 
 ## Notes
 
-<!-- Anything else worth knowing. Keep it short. -->
+Shared contracts are maintained in the umbrella and must not be contradicted here:
+`citation-evidence/wiki/SharedContracts.md`, `wiki/DependencyMap.md`,
+`docs/decisions/ADR-0006-selector-ownership-split.md`.
diff --git a/workplans/EANCH-WP-0001-intent-placeholder.md b/workplans/EANCH-WP-0001-intent-placeholder.md
index ba35700..3edbcf6 100644
--- a/workplans/EANCH-WP-0001-intent-placeholder.md
+++ b/workplans/EANCH-WP-0001-intent-placeholder.md
@@ -104,7 +104,7 @@ T01 boundary + package shape
 ```task
 id: EANCH-WP-0001-T01
 priority: high
-status: todo
+status: done
 state_hub_task_id: "ef88ff6a-590f-4858-a674-33f84c1d6116"
 ```