feat(space): InformationSpace orchestrator + integration; foundation slice complete (WP-0007 T7)

InformationSpace ties the slice together: conformance-gated attach → resolve →
read, with alias() recording coordination decisions in the log. Exposed from the
package root. End-to-end integration test (two folder shards → union read with
layered provenance + chorus + alias redirect + red-link + nonconformant-rejected).
pyflakes clean, 39 tests green. Flips WP-0007 done.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

SCOPE.md

@@ -17,7 +17,7 @@ Learnings update both SCOPE and INTENT where necessary.
 
 | Layer | State |
 |-------|-------|
-| Code | Python package scaffold (`src/shard_wiki/`, smoke tests only) |
+| Code | Foundation slice implemented (SHARD-WP-0007): `provenance` + `policy` leaves, `model` (Identity/Placement/Span/Page/CapabilityProfile), `adapters` (contract + FolderAdapter + conformance suite), `coordination` (event-sourced DecisionLog), `union` (resolution + chorus), `InformationSpace` orchestrator — attach→resolve→read works; 39 tests green |
 | Intent | `INTENT.md` established; authorization-in-core amendments drafted |
 | Research | yawex prior art; c2 origins; federation concepts; wikiengines overview (`research/260608-*/`); XWiki/TWiki/Foswiki deep dives (`research/260613-*/`); Xanadu + ZigZag + Roam + Obsidian + Notion + Joplin + Logseq + local-first workspaces (Anytype/AFFiNE/AppFlowy) + Trilium + Wiki.js + Federated Wiki + Wikibase + git-forge wikis + TiddlyWiki + ikiwiki + Quip + MojoMojo + Oddmuse + UseModWiki deep dives & shard-spectrum synthesis (`research/260614-*/`) |
 | Demand | NetKingdom integration asks captured, not yet negotiated |

src/shard_wiki/__init__.py

@@ -1,10 +1,16 @@
 """shard-wiki — Git-based Markdown wiki orchestrator and federation layer.
 
-See INTENT.md for the authoritative specification of scope and boundaries.
-This package orchestrates wiki-shaped content across heterogeneous *shards*;
-it is not itself a wiki engine.
+See INTENT.md for the authoritative specification of scope and boundaries, and
+spec/CoreArchitectureBlueprint.md for the architecture. This package orchestrates
+wiki-shaped content across heterogeneous *shards*; it is not itself a wiki engine.
+
+Foundation slice (SHARD-WP-0007): attach folder shard(s) to an
+:class:`~shard_wiki.space.InformationSpace`, resolve a name through the union, and
+read a page with layered provenance (chorus on ambiguity).
 """
 
+from shard_wiki.space import InformationSpace
+
 __version__ = "0.0.0"
 
-__all__ = ["__version__"]
+__all__ = ["__version__", "InformationSpace"]

src/shard_wiki/provenance/__init__.py

@@ -13,7 +13,7 @@ only stable data types plus the pure ``effective`` composition. Mechanism never
 from __future__ import annotations
 
 import dataclasses
-from dataclasses import dataclass, field
+from dataclasses import dataclass
 from datetime import datetime
 from enum import Enum
 

src/shard_wiki/space.py

@@ -0,0 +1,42 @@
+"""InformationSpace — the thin orchestrator entry tying the slice together (blueprint §3 L6).
+
+A root entity / information space: shards attach to it (conformance-gated, TSD §A.2), a
+coordination decision log records its canonical decisions, and a derived union resolves names to
+pages. This is the L6 consumer surface for the foundation slice (attach → resolve → read);
+a network API is a later workplan.
+"""
+
+from __future__ import annotations
+
+from shard_wiki.adapters import ShardAdapter, assert_conformant
+from shard_wiki.coordination import DecisionLog, EventType
+from shard_wiki.model import Page
+from shard_wiki.policy import DEFAULT_POLICY, Policy
+from shard_wiki.union import Resolution, UnionGraph
+
+__all__ = ["InformationSpace"]
+
+
+class InformationSpace:
+    def __init__(self, space_id: str, policy: Policy = DEFAULT_POLICY) -> None:
+        self.space_id = space_id
+        self.log = DecisionLog()
+        self.union = UnionGraph(space_id, log=self.log, policy=policy)
+
+    def attach(self, adapter: ShardAdapter) -> None:
+        """Attach a shard — only if it passes conformance (verified profile, I-3/§6.6)."""
+        assert_conformant(adapter)
+        self.union.attach(adapter)
+
+    def alias(self, name: str, target: str, actor: str | None = None) -> None:
+        """Record a coordination-canonical alias (``name`` → ``"shard:key"``) in the log."""
+        self.log.append(
+            self.space_id, EventType.ALIAS_SET, {"alias": name, "target": target}, actor=actor
+        )
+
+    def resolve(self, name: str) -> Resolution:
+        return self.union.resolve(name)
+
+    def read(self, name: str) -> Page:
+        """Resolve and return the page (or the canonical pick of a chorus). KeyError if red-link."""
+        return self.union.resolve(name).single()

tests/test_integration.py

@@ -0,0 +1,80 @@
+"""End-to-end slice test (SHARD-WP-0007 T7): attach folder shards → resolve → read union."""
+
+import shard_wiki
+from shard_wiki import InformationSpace
+from shard_wiki.adapters import ConformanceError, FolderAdapter, ShardAdapter
+from shard_wiki.model import CapabilityProfile, Identity, Page
+from shard_wiki.provenance import ProvenanceEnvelope, Staleness
+from shard_wiki.union import ResolutionKind
+
+
+def _folder(tmp_path, name, files):
+    root = tmp_path / name
+    for rel, text in files.items():
+        p = root / rel
+        p.parent.mkdir(parents=True, exist_ok=True)
+        p.write_text(text, encoding="utf-8")
+    return FolderAdapter(name, root)
+
+
+def test_public_api_surface():
+    assert isinstance(shard_wiki.__version__, str) and shard_wiki.__version__
+    assert shard_wiki.InformationSpace is InformationSpace
+
+
+def test_attach_resolve_read_union_with_provenance_and_chorus(tmp_path):
+    space = InformationSpace("team")
+    space.attach(_folder(tmp_path, "wikiA", {"Home.md": "A home", "OnlyA.md": "a"}))
+    space.attach(_folder(tmp_path, "wikiB", {"Home.md": "B home", "OnlyB.md": "b"}))
+
+    # unique page → single, with provenance attributing the source shard
+    only_a = space.read("OnlyA")
+    assert only_a.body == "a"
+    assert only_a.envelope.source_shard == "wikiA"
+    assert only_a.envelope.staleness is Staleness.FRESH
+    assert only_a.envelope.observed_at is not None
+
+    # same name in both shards → chorus, divergence recorded both ways (union without erasure)
+    res = space.resolve("Home")
+    assert res.kind is ResolutionKind.CHORUS
+    assert {p.envelope.source_shard for p in res.pages} == {"wikiA", "wikiB"}
+    for p in res.pages:
+        assert len(p.envelope.divergence) == 1
+
+    # missing → red-link
+    assert space.resolve("Ghost").is_red_link
+
+
+def test_alias_redirects_across_the_union(tmp_path):
+    space = InformationSpace("team")
+    space.attach(_folder(tmp_path, "wikiA", {"Index.md": "the index"}))
+    space.alias("Start", "wikiA:Index")
+    assert space.read("Start").body == "the index"
+
+
+class _LyingShard(ShardAdapter):
+    def __init__(self, profile: CapabilityProfile) -> None:
+        self._p = profile
+
+    @property
+    def shard_id(self) -> str:
+        return "liar"
+
+    def profile(self) -> CapabilityProfile:
+        return self._p
+
+    def keys(self):
+        return ["X"]
+
+    def read(self, key: str) -> Page:
+        return Page(Identity("not-liar", key), "x", ProvenanceEnvelope(source_shard="x"))
+
+
+def test_attach_rejects_nonconformant_shard(tmp_path):
+    good_profile = _folder(tmp_path, "wikiA", {"Home.md": "x"}).profile()
+    space = InformationSpace("team")
+    try:
+        space.attach(_LyingShard(good_profile))
+        raise AssertionError("expected ConformanceError")
+    except ConformanceError:
+        pass

workplans/SHARD-WP-0007-foundation-implementation.md

@@ -4,7 +4,7 @@ type: workplan
 title: "foundation implementation — model, contract, decision log, union read"
 domain: whynot
 repo: shard-wiki
-status: active
+status: done
 owner: tegwick
 topic_slug: whynot
 created: "2026-06-15"
@@ -131,7 +131,7 @@ the same name → chorus; alias from the log redirects resolution.
 
 ```task
 id: SHARD-WP-0007-T7
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "86c0b255-e373-460d-859d-a39bf6ea4ffb"
 ```