---
id: EANCH-WP-0001
type: workplan
title: "Bootstrap evidence-anchor and extract the current anchor slice from citation-evidence"
domain: infotech
repo: evidence-anchor
status: finished
owner: codex
topic_slug: citation_evidence_mvp
created: "2026-06-21"
updated: "2026-07-08"
state_hub_workstream_id: "69e30105-ace2-49b6-a1de-a509052854c1"
spec_refs:
  - INTENT.md
  - README.md
  - SCOPE.md
  - ../citation-evidence/wiki/SharedContracts.md
  - ../citation-evidence/wiki/DependencyMap.md
  - ../citation-evidence/docs/decisions/ADR-0006-selector-ownership-split.md
---

# EANCH-WP-0001 — Bootstrap And Extract Evidence Anchor

## Goal

Turn `evidence-anchor` from an intent-only placeholder into the real home of
the current anchor slice that already exists in
`../citation-evidence/src/anchor/`, while keeping the extraction bounded enough
to run safely under `/ralph-workplan`.

This workplan is intentionally about **package bootstrap + code extraction +
consumer cutover + verification**. It is not the place to invent the full next
generation of anchor behavior.

## Ralph Loop Fit

Recommended invocation once the repo is ready to execute:

```text
/ralph-workplan workplans/EANCH-WP-0001-intent-placeholder.md --max-iterations 12
```

Guardrails for the loop:

- stop at extraction/cutover/verification; do not expand into open-ended
  feature design during the same loop
- if stale detection, fuzzy recovery, or HTML/Markdown support turns into
  substantive new implementation work, register a follow-on workplan instead of
  growing this one in place
- HEUREKA condition for this workplan is: extracted package exists, umbrella
  consumer is wired to it, verification is green, and the remaining gaps are
  registered as next work rather than left implicit

## Background And References

Repo review on 2026-07-08 found that `evidence-anchor` is still docs-only:

- local repo contents are `INTENT.md`, `README.md`, a template `SCOPE.md`,
  registry metadata, and this workplan
- the concrete implementation currently lives in
  `../citation-evidence/src/anchor/`
- that upstream slice already contains selector creation/resolution logic,
  PDF selector math, a PDF viewer adapter spike, scroll/highlight helpers,
  and unit tests
- `../citation-engine` already exports the shared `Document`,
  `DocumentRepresentation`, `Selector`, `AnnotationResolutionStatus`, and
  `normalize()` surfaces the extracted code needs

Relevant upstream files already reviewed:

- `../citation-evidence/src/anchor/types.ts`
- `../citation-evidence/src/anchor/selectors/create.ts`
- `../citation-evidence/src/anchor/selectors/resolve.ts`
- `../citation-evidence/src/anchor/pdf-selector-math.ts`
- `../citation-evidence/src/anchor/pdf-viewer-adapter-spike.tsx`
- `../citation-evidence/src/anchor/scroll-job.ts`
- matching upstream tests under `../citation-evidence/src/anchor/`

## Non-Goals For This Ralph Slice

- full HTML/Markdown selector implementation
- a production-grade fuzzy re-anchoring system
- new persistence, binder, source-ingest, or workspace-shell behavior
- speculative architecture beyond what is needed to extract and verify the
  existing anchor slice
- indefinite cross-repo cleanup without an explicit verification target

## Execution Order

```text
T01 boundary + package shape
  -> T02 repo bootstrap
    -> T03 pure selector/resolution extraction
      -> T04 PDF adapter extraction
        -> T05 citation-evidence cutover
          -> T06 register remaining post-extraction gaps
            -> T07 verification + state-hub close-out
```

## Task Breakdown

## T01 — Codify the repo boundary and initial package shape

```task
id: EANCH-WP-0001-T01
priority: high
status: done
state_hub_task_id: "ef88ff6a-590f-4858-a674-33f84c1d6116"
```

Turn the repo from an intent bucket into a concrete extraction target.

Scope:

- finish `SCOPE.md` so it reflects the actual boundary described in
  `INTENT.md`, `SharedContracts.md`, and `ADR-0006`
- update `README.md` so it no longer points only at upstream ownership, but
  states the package/API shape this repo is preparing to expose
- document the initial module layout for the first extracted version
  (`selectors`, `resolver`, `pdf`, `highlight`, `tests`, public entrypoints)
- record what explicitly stays out of scope for this phase:
  persistence, binder/work semantics, ingestion, and umbrella app shell

Acceptance:

- `SCOPE.md` is no longer a template; it names the extracted boundary,
  current maturity, relevant dependencies, and non-goals
- `README.md` explains the package purpose, sibling-checkout install model, and
  public module layout expectations
- the repo docs clearly distinguish:
  `citation-engine` owns shared selector types;
  `evidence-anchor` owns selector behavior and viewer contracts

Deliverables:

- finished `SCOPE.md`
- extraction-oriented `README.md`
- concise package shape documented in-repo

Done when a fresh agent can open this repo and know exactly what should move
here and what must stay elsewhere.

## T02 — Bootstrap the local TypeScript package and test harness

```task
id: EANCH-WP-0001-T02
status: done
priority: high
depends_on: [T01]
state_hub_task_id: "59c07bc6-7a80-4f58-b1cf-ee2f0c26e8ed"
```

Create the minimum package scaffolding needed to host extracted code.

Scope:

- add `package.json`, `tsconfig.json`, lint/test scripts, and a test runner
  consistent with sibling repos
- define public exports for the package and for any subpath exports that need
  to stay stable during cutover
- wire imports to `@citation-evidence/engine/shared` instead of local
  `@shared/*` aliases from the umbrella repo
- ensure the repo can typecheck and run tests without importing
  `citation-evidence` internals

Acceptance:

- the scaffold matches the existing `citation-engine` conventions closely
  enough that extraction is mostly file movement plus import rewrites
- `pnpm test`, `pnpm typecheck`, and `pnpm lint` exist as local scripts
- the package exposes a stable public entrypoint and any necessary subpath
  exports for the adapter slice

Deliverables:

- `package.json`
- `tsconfig.json`
- test/lint config files
- any required ignore / Node version files

Done when this repo can host the extracted code as a standalone TypeScript
package with only `citation-engine` as a shared-type dependency.

## T03 — Extract pure selector creation and resolution logic

```task
id: EANCH-WP-0001-T03
status: done
priority: critical
depends_on: [T02]
state_hub_task_id: "d7bff928-a022-4cc4-a151-950ffaaf622b"
```

Move the non-UI anchoring behavior out of `../citation-evidence/src/anchor/`.

Scope:

- extract and adapt:
  `types.ts`,
  `selectors/create.ts`,
  `selectors/resolve.ts`,
  `selectors/index.ts`,
  `index.ts`,
  and `pdf-selector-math.ts`
- port the matching unit tests:
  `selectors/create.test.ts`,
  `selectors/resolve.test.ts`,
  and `pdf-selector-math.test.ts`
- keep the selector-ownership split intact:
  selector data shapes remain in `citation-engine`,
  selector behavior lives here
- preserve the current exact-match confidence ladder and selector redundancy
  rules from `SharedContracts.md`

Acceptance:

- the extracted pure modules compile against `@citation-evidence/engine/shared`
  imports, not umbrella-only aliases
- the three upstream unit-test groups pass locally in this repo
- no UI/viewer package dependencies are required for this task

Deliverables:

- extracted core source files under `src/`
- ported unit tests for selector creation, selector resolution, and PDF
  selector math
- local exports wired through the package entrypoint

Done when the pure anchor modules pass locally in this repo and no longer
depend on the umbrella repo folder structure.

## T04 — Extract the PDF viewer adapter and highlight/scroll helpers

```task
id: EANCH-WP-0001-T04
status: done
priority: high
depends_on: [T03]
state_hub_task_id: "1deca610-8502-44e5-90c7-43e355489f55"
```

Move the PDF-specific adapter surface into this repo without leaking viewer
library types into engine/shared layers.

Scope:

- extract and adapt:
  `pdf-viewer-adapter-spike.tsx`,
  `scroll-job.ts`,
  `highlight-styles.css`,
  and `debug-textlayer.css`
- decide explicitly whether the first local export remains an explicitly-named
  spike or is promoted to the initial `PDFViewerAdapter`
- keep `react-pdf-highlighter-plus` and PDF.js imports confined to the adapter
  package boundary
- port `scroll-job.test.ts` and add a local demo or harness that still proves
  select -> store selectors -> resolve -> scroll -> highlight

Acceptance:

- viewer-library imports exist only inside the adapter package boundary
- the scroll/highlight helper test passes locally
- a maintainer can identify the supported PDF adapter surface and its current
  non-goals from the repo without reading the umbrella repo

Deliverables:

- extracted adapter and helper files
- local adapter export decision documented in code or README
- at least one runnable or inspectable local harness path for the PDF adapter

Done when the PDF adapter contract is owned here and the viewer-specific
implementation remains behind `DocumentViewerAdapter`.

## T05 — Cut citation-evidence over to the extracted package

```task
id: EANCH-WP-0001-T05
status: done
priority: high
depends_on: [T03, T04]
state_hub_task_id: "2fd9bd62-5d79-49b5-aee7-45e0a37313ba"
```

Replace the umbrella repo's internal anchor slice with a dependency on this
repo.

> **RESOLVED (2026-07-08).** The parallel `evidence-source` extraction landed
> (`citation-evidence@4ede979`), leaving `main` clean. The cutover was then
> executed and verified: umbrella typecheck + 95 tests + production build all
> green (`citation-evidence@d145148`). Package published as
> `@citation-evidence/evidence-anchor` with `.`, `./selectors`, `./types`, and
> `./pdf` exports; node-env consumers use the pure subpaths. Original blocker
> context retained below.
>
> **BLOCKED (2026-07-08, ralph loop iteration).** Extraction T01–T04 are
> complete, committed, and verified green in `evidence-anchor` (30 tests,
> typecheck, lint). T05 was **not** attempted because the umbrella
> (`../citation-evidence`) has **another session's uncommitted work in
> progress on `main`** — a parallel `evidence-source` extraction:
> `package.json` adds `@citation-evidence/evidence-source` (link),
> `src/source/pdf/*` is deleted, and `tests/integration/anchor-source-roundtrip.test.ts`
> is already modified — the same shared file this cutover must edit (it imports
> both `@anchor/*` and the new source package). Forcing the anchor cutover into
> that dirty tree would entangle the two extractions and likely commit a
> non-building intermediate state. Needs human coordination: land/park the
> source extraction first, or agree how the two cutovers share the roundtrip
> test and `package.json`. The ralph loop was deactivated at this point.
>
> Cutover plan once unblocked (bounded — 4 import sites, all via `@anchor/index`):
> add `"evidence-anchor": "link:../evidence-anchor"`; repoint
> `PdfSelectionCapture` + `createSelectors` → `evidence-anchor`, and
> `PdfSpikeViewer`/`StoredAnnotation` + `getHighlightClientRects` →
> `evidence-anchor/pdf`; drop the `@anchor` tsconfig/vite alias; delete or thin
> `src/anchor/`; run umbrella typecheck/test/build.

Scope:

- update `../citation-evidence` to consume `evidence-anchor` through a linked
  package dependency instead of `src/anchor/` as the source of truth
- remove duplicate anchor logic from `citation-evidence` or reduce it to thin
  compatibility re-exports during transition
- verify `citation-evidence` build/test flows still pass against the extracted
  package
- update cross-repo docs so the ownership statement is no longer aspirational

Acceptance:

- `citation-evidence/package.json` points at `link:../evidence-anchor` (or the
  equivalent local consumer path actually chosen)
- umbrella imports resolve through the extracted package instead of treating
  `src/anchor/` as the canonical implementation
- `citation-evidence` build/test/typecheck remain green after the cutover

Deliverables:

- consumer dependency and import updates in `../citation-evidence`
- any temporary compatibility shims reduced to thin re-exports only
- updated ownership docs across the affected repos

Done when `citation-evidence` builds and tests against this repo and
`src/anchor/` is no longer the canonical home of anchor behavior.

## T06 — Register the post-extraction gaps instead of expanding the slice

```task
id: EANCH-WP-0001-T06
status: done
priority: medium
depends_on: [T05]
state_hub_task_id: "4e82ee7b-e813-441f-a41f-8f17a75fee57"
```

Current upstream code handles exact resolution plus PDF fallbacks, but it does
not yet satisfy the entire intent promised in `INTENT.md`. Those gaps should be
made explicit and queued, not silently folded into this extraction loop.

Scope:

- document the gap between the extracted MVP behavior and the broader
  `INTENT.md` target for:
  `stale`,
  orphaned annotations,
  fuzzy or recovery-oriented re-anchoring,
  and HTML/Markdown selectors
- decide which gaps belong in one follow-on extraction-hardening workplan
  versus separate format-specific workplans
- write the follow-on plan(s) or clearly register them in this workplan as
  explicit next slices

Acceptance:

- no major promised behavior remains as "implicit future work"
- the next work after extraction is named concretely enough that another Ralph
  loop can pick it up without re-discovery
- the current workplan stays bounded: no new broad implementation starts here

Deliverables:

- follow-on workplan section or new workplan file(s) for gap closure
- updated references in `README.md`/`SCOPE.md` if they previously implied those
  features already existed here

Done when the extracted package ships with an honest, explicit map of the
remaining anchor work instead of vague future intent.

**Gap map (registered 2026-07-08):** the two follow-on workplans below cover
everything `INTENT.md` promises beyond the extracted MVP slice. `SCOPE.md`
already lists these under "Not in this extraction slice"; `README.md` points
here. No promised behavior is left as implicit future work.

- `workplans/EANCH-WP-0002-anchor-resolution-hardening.md` — stale/orphan
  semantics, fuzzy/recovery re-anchoring, and promoting `PdfSpikeViewer` to a
  production `PDFViewerAdapter` (existing PDF/text path).
- `workplans/EANCH-WP-0003-non-pdf-selectors.md` — HTML/Markdown `DomRange` +
  `Structural` selectors and a non-PDF viewer adapter (new format track;
  starts with a `citation-engine` shared-type contract change).

Both are `status: proposed` and will be registered in the hub by
`fix-consistency` (C-06) during T07 — not by hand.

## T07 — Verification, sync, and close-out evidence

```task
id: EANCH-WP-0001-T07
status: done
priority: high
depends_on: [T06]
state_hub_task_id: "e88623a9-38d0-4aeb-a7d7-6ec78342d57b"
```

Close the loop with machine-verifiable evidence and State Hub hygiene.

Scope:

- run the local verification commands for `evidence-anchor`
- run the affected verification commands for `citation-evidence` after cutover
- update task/workplan status, run `fix-consistency`, and log the required
  progress note
- ensure the repo capability note and brief remain truthful after extraction

Acceptance:

- `pnpm test`, `pnpm typecheck`, and `pnpm lint` are green in this repo
- the relevant `citation-evidence` verification commands are green after
  consumer cutover
- `fix-consistency` passes and the workplan can be moved from `active` to
  `finished` without status drift

Deliverables:

- verification evidence in commit history and/or progress note
- synced State Hub task/workplan state
- clean handoff for the next anchor follow-on workplan

Done when the extraction is verified end-to-end and the workplan can retire
cleanly under HEUREKA instead of stopping at "probably finished".

**Verification (2026-07-08):**

- `evidence-anchor`: `pnpm test` 30 passed (4 files), `typecheck` clean,
  `lint` clean.
- `citation-evidence` (post-cutover, `d145148`): `pnpm typecheck` clean,
  `pnpm test` 95 passed (26 files), `pnpm build` succeeded.

Commits: `08b3105` T01 · `0e93b68` T02 · `bd7f56c` T03 · `5b77dbd` T04 ·
`f32b500` T05 (umbrella `d145148`) · `0871f79` T06. Workplan frontmatter set to
`finished`; follow-on gaps live in `EANCH-WP-0002` and `EANCH-WP-0003`.