docs: remove all Hypercerts SDK references

Delete the SDK page (pages/tools/sdk.md) and remove all mentions of
the Hypercerts SDK across 28 files. Code examples now use @atproto/api
directly instead of @hypercerts-org/sdk-core. Navigation and index
cards updated accordingly. Build passes cleanly.

Author: s-adamantine

lib/navigation.js

@@ -52,7 +52,6 @@ export const navigation = [
   {
     section: "Tools",
     children: [
-      { title: "Hypercerts SDK", path: "/tools/sdk" },
       { title: "Scaffold Starter App", path: "/tools/scaffold" },
       { title: "Hypercerts CLI", path: "/tools/hypercerts-cli" },
       { title: "Hyperindex", path: "/tools/hyperindex" },

pages/architecture/account-and-identity.md

@@ -63,7 +63,7 @@ To set up an organizational account, create an account at [certified.app](https:
 
 ### OAuth (for applications)
 
-Applications authenticate users via AT Protocol OAuth. The [Hypercerts SDK](/tools/sdk) handles the full OAuth flow — authorization, token management, and session restoration. Users authorize your app through their PDS and never share credentials with your application. See the [Quickstart](/getting-started/quickstart) for the SDK setup.
+Applications authenticate users via AT Protocol OAuth. The AT Protocol client libraries handle the full OAuth flow — authorization, token management, and session restoration. Users authorize your app through their PDS and never share credentials with your application. See the [Quickstart](/getting-started/quickstart) for the authentication setup.
 
 ### App passwords (for scripts and CLI)
 

pages/architecture/overview.md

@@ -13,7 +13,7 @@ The protocol operates across three layers that work together to enable portable
 
 The **Data Layer** is the foundation. AT Protocol stores claims, attachments, and evaluations. Personal Data Servers (PDS) host user-controlled records — organizations can create dedicated PDS accounts for shared repositories. Relays aggregate data across servers. Indexers build queryable views that applications consume.
 
-The **Application Layer** sits on top of the data layer. Funding platforms, dashboards, and evaluation tools live here. These applications read from and write to the data layer using the [Hypercerts SDK](/tools/sdk) and [Hyperindex](/tools/hyperindex).
+The **Application Layer** sits on top of the data layer. Funding platforms, dashboards, and evaluation tools live here. These applications read from and write to the data layer using the [ATProto API](https://atproto.com/docs) and [Hyperindex](/tools/hyperindex).
 
 The **Ownership Layer** is planned but not yet implemented. The intended design uses a freeze-then-fund model where hypercerts are frozen and anchored on-chain before funding — ensuring funders know exactly what they are paying for. See [Funding & Value Flow](/core-concepts/funding-and-value-flow) for details.
 

pages/core-concepts/funding-and-value-flow.md

@@ -139,4 +139,3 @@ Two years later, a second evaluator, Eve, assesses the health of Alice's trees a
 - [Data Flow & Lifecycle](/architecture/data-flow-and-lifecycle) — how a hypercert moves through the system
 - [Roadmap](/roadmap) — current build priorities and development phases
 
-Next: [Hypercerts SDK](/tools/sdk) — the TypeScript SDK for building on the Hypercerts protocol.

pages/core-concepts/hypercerts-core-data-model.md

@@ -24,7 +24,7 @@ Every hypercert starts with an **activity claim** — the central record that an
 
 In addition to these core dimensions, the activity claim can define the rights that come with this claim. The basic right is just "public display", e.g. bragging rights about financial or non-financial contributions to impact. If the hypercert is tokenized, the field can define how the hypercert is allowed to be transferred.
 
-The activity claim is what you create when you call `repo.hypercerts.create()` in the SDK. It gets a permanent AT-URI like `at://did:plc:alice123/org.hypercerts.claim.activity/3k7`.
+The activity claim is the core record you create when making a hypercert. It gets a permanent AT-URI like `at://did:plc:alice123/org.hypercerts.claim.activity/3k7`.
 
 ## Additional details
 

pages/getting-started/building-on-hypercerts.md

@@ -38,11 +38,17 @@ Build services that help domain experts create structured, verifiable evaluation
 - Educational outcome measurement for learning programs
 
 ```javascript
-// Example: Create an evaluation via the SDK
-const evaluation = await repo.hypercerts.addEvaluation({
-  subjectUri: claimUri,
-  evaluators: [evaluatorDid],
-  summary: "Scientific rigor and reproducibility assessment",
+// Example: Create an evaluation
+const evaluation = await agent.com.atproto.repo.createRecord({
+  repo: agent.session.did,
+  collection: "org.hypercerts.claim.evaluation",
+  record: {
+    subject: { uri: claimUri, cid: claimCid },
+    evaluators: [evaluatorDid],
+    summary: "Scientific rigor and reproducibility assessment",
+    $type: "org.hypercerts.claim.evaluation",
+    createdAt: new Date().toISOString(),
+  },
 });
 ```
 
@@ -111,22 +117,23 @@ Authenticate users via OAuth and write records to their PDS on their behalf.
 **When to use:** Tools where users create their own hypercerts, evaluations, or measurements through your interface.
 
 ```javascript
-// OAuth flow
-const session = await sdk.callback(callbackParams);
-const repo = sdk.getRepository(session);
+// Authenticate via ATProto OAuth
+const agent = new AtpAgent({ service: userPdsUrl });
+await agent.resumeSession(savedSession);
 
 // Write to user's PDS
-await repo.hypercerts.create({
-  title: "Open source library for data processing",
-  shortDescription: "Built and maintained a data processing library.",
-  description: "Developed the core architecture and maintained the library through 3 major releases.",
-  workScope: "Software Development",
-  startDate: "2026-01-01T00:00:00Z",
-  endDate: "2026-06-30T23:59:59Z",
-  rights: {
-    name: "Public Display",
-    type: "display",
-    description: "Right to publicly display this contribution",
+await agent.com.atproto.repo.createRecord({
+  repo: agent.session.did,
+  collection: "org.hypercerts.claim.activity",
+  record: {
+    title: "Open source library for data processing",
+    shortDescription: "Built and maintained a data processing library.",
+    description: "Developed the core architecture and maintained the library through 3 major releases.",
+    workScope: { allOf: ["Software Development"] },
+    startDate: "2026-01-01T00:00:00Z",
+    endDate: "2026-06-30T23:59:59Z",
+    $type: "org.hypercerts.claim.activity",
+    createdAt: new Date().toISOString(),
   },
 });
 ```
@@ -140,26 +147,20 @@ Create a dedicated organizational account on a PDS and create records under the
 **When to use:** Platforms that issue hypercerts on behalf of others, or evaluation services that publish assessments under the platform's authority.
 
 ```javascript
-// Platform creates claim on behalf of contributor
-await repo.hypercerts.create({
-  title: "Bounty #123: Fix authentication bug",
-  shortDescription: "Resolved critical authentication vulnerability.",
-  description: "Identified and patched a session fixation vulnerability in the OAuth callback handler.",
-  workScope: "Security, Bug Fix",
-  startDate: "2026-01-15T00:00:00Z",
-  endDate: "2026-01-20T23:59:59Z",
-  rights: {
-    name: "Public Display",
-    type: "display",
-    description: "Right to publicly display this contribution",
+// Platform creates claim under its own DID
+await agent.com.atproto.repo.createRecord({
+  repo: agent.session.did,
+  collection: "org.hypercerts.claim.activity",
+  record: {
+    title: "Bounty #123: Fix authentication bug",
+    shortDescription: "Resolved critical authentication vulnerability.",
+    description: "Identified and patched a session fixation vulnerability in the OAuth callback handler.",
+    workScope: { allOf: ["Security", "Bug Fix"] },
+    startDate: "2026-01-15T00:00:00Z",
+    endDate: "2026-01-20T23:59:59Z",
+    $type: "org.hypercerts.claim.activity",
+    createdAt: new Date().toISOString(),
   },
-  contributions: [
-    {
-      contributors: [contributorDid],
-      contributionDetails: "Bug fix author",
-      weight: "100",
-    },
-  ],
 });
 ```
 
@@ -239,15 +240,6 @@ Propose changes to lexicons through the standard process:
 The GitHub repository for lexicon proposals will be available soon. Check the [Hypercerts GitHub](https://github.com/hypercerts-org) for updates.
 {% /callout %}
 
-### SDK Contributions
-
-The Hypercerts SDK is open source. Contributions welcome:
-
-- Bug fixes and performance improvements
-- New helper functions for common operations
-- Better TypeScript types and documentation
-- Examples and tutorials
-
 ### Running a Relay
 
 Help decentralize the network by running a relay node. Relays aggregate events from PDSs and make them available to indexers.

pages/getting-started/common-use-cases.md

@@ -5,48 +5,31 @@ description: See how hypercerts work for different types of contributions.
 
 # Common Use Cases
 
-Hypercerts work for any kind of impact work. This page shows four common scenarios with real SDK code.
+Hypercerts work for any kind of impact work. This page shows four common scenarios with code examples.
 
 ## Open-source software maintenance
 
 A team maintains a widely-used library. They create a hypercert covering a year of maintenance — bug fixes, documentation updates, and community support.
 
 ```typescript
-import { createATProtoSDK } from "@hypercerts-org/sdk-core";
-
-const sdk = createATProtoSDK({ /* oauth config */ });
-const session = await sdk.restoreSession("did:plc:abc123");
-const repo = sdk.getRepository(session);
-
-const result = await repo.hypercerts.create({
-  title: "Library maintenance, 2025",
-  shortDescription: "Ongoing maintenance of an open-source library",
-  description: "Fixed 47 bugs, reviewed 120 pull requests, updated documentation, and provided community support on Discord.",
-  workScope: "Software Development, Open Source",
-  startDate: "2025-01-01T00:00:00Z",
-  endDate: "2025-12-31T23:59:59Z",
-  rights: {
-    name: "Public Display",
-    type: "display",
-    description: "Right to publicly display this contribution",
+import { AtpAgent } from "@atproto/api";
+
+const agent = new AtpAgent({ service: "https://bsky.social" });
+await agent.login({ identifier: "your-handle.certified.app", password: "your-app-password" });
+
+const result = await agent.com.atproto.repo.createRecord({
+  repo: agent.session.did,
+  collection: "org.hypercerts.claim.activity",
+  record: {
+    title: "Library maintenance, 2025",
+    shortDescription: "Ongoing maintenance of an open-source library",
+    description: "Fixed 47 bugs, reviewed 120 pull requests, updated documentation, and provided community support on Discord.",
+    workScope: { allOf: ["Software Development", "Open Source"] },
+    startDate: "2025-01-01T00:00:00Z",
+    endDate: "2025-12-31T23:59:59Z",
+    $type: "org.hypercerts.claim.activity",
+    createdAt: new Date().toISOString(),
   },
-  contributions: [
-    {
-      contributors: ["did:plc:alice123"],
-      contributionDetails: "Core developer",
-      weight: "50",
-    },
-    {
-      contributors: ["did:plc:bob456"],
-      contributionDetails: "Documentation lead",
-      weight: "30",
-    },
-    {
-      contributors: ["did:plc:carol789"],
-      contributionDetails: "Community manager",
-      weight: "20",
-    },
-  ],
 });
 ```
 
@@ -57,25 +40,19 @@ After creating the hypercert, the team attaches links to the repository, release
 A conservation group restores degraded forest over several years. They document the work with location data and measurements.
 
 ```typescript
-const result = await repo.hypercerts.create({
-  title: "Forest restoration project, 2020–2025",
-  shortDescription: "Reforestation and biodiversity recovery in degraded tropical forest",
-  description: "Restored 200 hectares of degraded tropical forest through native species planting, invasive species removal, and community stewardship programs.",
-  workScope: "Ecosystem Restoration, Biodiversity Conservation",
-  startDate: "2020-01-01T00:00:00Z",
-  endDate: "2025-12-31T23:59:59Z",
-  rights: {
-    name: "Public Display",
-    type: "display",
-    description: "Right to publicly display this contribution",
+const result = await agent.com.atproto.repo.createRecord({
+  repo: agent.session.did,
+  collection: "org.hypercerts.claim.activity",
+  record: {
+    title: "Forest restoration project, 2020–2025",
+    shortDescription: "Reforestation and biodiversity recovery in degraded tropical forest",
+    description: "Restored 200 hectares of degraded tropical forest through native species planting, invasive species removal, and community stewardship programs.",
+    workScope: { allOf: ["Ecosystem Restoration", "Biodiversity Conservation"] },
+    startDate: "2020-01-01T00:00:00Z",
+    endDate: "2025-12-31T23:59:59Z",
+    $type: "org.hypercerts.claim.activity",
+    createdAt: new Date().toISOString(),
   },
-  locations: [{
-    lpVersion: "1",
-    srs: "EPSG:4326",
-    locationType: "coordinate-decimal",
-    location: "-84.10, 10.42",
-    name: "Restoration site",
-  }],
 });
 ```
 
@@ -86,35 +63,19 @@ The group then adds measurement records tracking hectares restored, native speci
 A research team completes a multi-year study and wants to document the effort with clear contributor roles.
 
 ```typescript
-const result = await repo.hypercerts.create({
-  title: "Drug delivery mechanism research, 2022–2024",
-  shortDescription: "Novel approaches to improving therapeutic delivery",
-  description: "Developed and tested three novel nanoparticle-based drug delivery mechanisms, resulting in two published papers and one patent application.",
-  workScope: "Biomedical Research, Drug Delivery",
-  startDate: "2022-03-01T00:00:00Z",
-  endDate: "2024-11-30T23:59:59Z",
-  rights: {
-    name: "Public Display",
-    type: "display",
-    description: "Right to publicly display this contribution",
+const result = await agent.com.atproto.repo.createRecord({
+  repo: agent.session.did,
+  collection: "org.hypercerts.claim.activity",
+  record: {
+    title: "Drug delivery mechanism research, 2022–2024",
+    shortDescription: "Novel approaches to improving therapeutic delivery",
+    description: "Developed and tested three novel nanoparticle-based drug delivery mechanisms, resulting in two published papers and one patent application.",
+    workScope: { allOf: ["Biomedical Research", "Drug Delivery"] },
+    startDate: "2022-03-01T00:00:00Z",
+    endDate: "2024-11-30T23:59:59Z",
+    $type: "org.hypercerts.claim.activity",
+    createdAt: new Date().toISOString(),
   },
-  contributions: [
-    {
-      contributors: ["did:plc:pi001"],
-      contributionDetails: "Principal investigator",
-      weight: "40",
-    },
-    {
-      contributors: ["did:plc:postdoc002"],
-      contributionDetails: "Postdoctoral researcher",
-      weight: "35",
-    },
-    {
-      contributors: ["did:plc:grad003"],
-      contributionDetails: "Graduate student",
-      weight: "25",
-    },
-  ],
 });
 ```
 
@@ -125,17 +86,18 @@ Attachments link to the published paper (via DOI), lab notebooks, and experiment
 A group runs regular workshops teaching practical skills to underrepresented communities. They want to document their educational impact.
 
 ```typescript
-const result = await repo.hypercerts.create({
-  title: "Community workshops, 2025",
-  shortDescription: "Free skill-building workshops for underrepresented groups",
-  description: "Organized and delivered 24 free workshops covering web development, data literacy, and career skills to 450 participants from underrepresented communities.",
-  workScope: "Education, Community Building",
-  startDate: "2025-01-01T00:00:00Z",
-  endDate: "2025-12-31T23:59:59Z",
-  rights: {
-    name: "Public Display",
-    type: "display",
-    description: "Right to publicly display this contribution",
+const result = await agent.com.atproto.repo.createRecord({
+  repo: agent.session.did,
+  collection: "org.hypercerts.claim.activity",
+  record: {
+    title: "Community workshops, 2025",
+    shortDescription: "Free skill-building workshops for underrepresented groups",
+    description: "Organized and delivered 24 free workshops covering web development, data literacy, and career skills to 450 participants from underrepresented communities.",
+    workScope: { allOf: ["Education", "Community Building"] },
+    startDate: "2025-01-01T00:00:00Z",
+    endDate: "2025-12-31T23:59:59Z",
+    $type: "org.hypercerts.claim.activity",
+    createdAt: new Date().toISOString(),
   },
 });
 ```