diff --git a/README.md b/README.md
index 808fed2..c56da7f 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,15 @@ const mentions = await socialhose.getMentions({
 console.log(mentions.count);
 ```
 
+Documentation lives with the package:
+
+- [Quick README](./sdks/javascript/README.md)
+- [Usage guide](./sdks/javascript/docs/GUIDE.md)
+- [API reference](./sdks/javascript/docs/API.md)
+- [Entity analytics](./sdks/javascript/docs/ENTITY_ANALYTICS.md)
+- [Caching and retries](./sdks/javascript/docs/CACHING_AND_RETRIES.md)
+- [Examples](./sdks/javascript/examples)
+
 ## Development
 
 Use pnpm 9.x.
diff --git a/sdks/javascript/README.md b/sdks/javascript/README.md
index 5efdea5..cbb151c 100644
--- a/sdks/javascript/README.md
+++ b/sdks/javascript/README.md
@@ -2,13 +2,15 @@
 
 TypeScript SDK for the Socialhose Public API.
 
+Use it from backend TypeScript/JavaScript to fetch campaigns, analytics, mentions, mailing lists, and SDK-composed entity analytics with authentication, retries, timeouts, and caching handled consistently.
+
 ## Install
 
 ```bash
 npm install @socialhose/api
 ```
 
-Node 18+ is required because the SDK uses the built-in `fetch`, `Response`, and `AbortSignal.timeout` APIs. You can pass a custom `fetch` implementation if needed.
+Node 18+ is required because the SDK uses built-in `fetch`, `Response`, and `AbortSignal.timeout`. You can pass a custom `fetch` implementation if needed.
 
 ## Quickstart
 
@@ -28,6 +30,14 @@ const mentions = await socialhose.getMentions({
 console.log(mentions.count, mentions.results[0]?.content);
 ```
 
+## Documentation
+
+- [Usage guide](./docs/GUIDE.md) — what the SDK is, setup, common workflows, operational guidance.
+- [API reference](./docs/API.md) — every public class, function, method, option, and exported type.
+- [Entity analytics](./docs/ENTITY_ANALYTICS.md) — how term-level analytics are built, accuracy safeguards, rate-limit guidance.
+- [Caching and retries](./docs/CACHING_AND_RETRIES.md) — cache contract, retry policy, failure semantics.
+- [Examples](./examples) — runnable TypeScript examples.
+
 ## Configuration
 
 ```ts
@@ -42,127 +52,29 @@ const socialhose = new SocialhoseClient({
 
 The SDK sends `Authorization: Api-Key <key>` and a browser-like `User-Agent` by default. The user-agent is intentional: the current Socialhose API edge rejects some non-browser requests.
 
-## Endpoints
+## Main capabilities
 
-### Campaigns
-- `getCampaigns()`
-- `getCampaign(id)`
+- Campaign discovery: `getCampaigns()`, `getCampaign(id)`, `getCampaignIdByMatch(match)`.
+- Analytics: `getOverview()`, `getTimeline()`, `getSentiment()`, `getShareOfVoice()`, `getPlatforms()`, `getTopKeywords()`, `getTrending()`, `getTopMentions()`.
+- Mentions: `getMentions()` with campaign, date, platform, sentiment, text search, pagination, and ordering filters.
+- Mailing lists: `getMailingLists()`, `inviteMailingListMember()`.
+- Entity analytics: `getEntityBrief()`, `getEntityStats()`, `getEntityBriefs()`.
+- Low-level access: `get(path, params)`, `post(path, body)`.
+- Caching: built-in `MemoryCache`, disabling via `NoopCache`, or any custom `Cache` implementation.
 
-### Analytics
-- `getOverview(filters)`
-- `getTimeline(filters)`
-- `getSentiment(filters)`
-- `getShareOfVoice(filters)`
-- `getPlatforms(filters)`
-- `getTopKeywords(filters)`
-- `getTrending(filters)`
-- `getTopMentions(filters)`
+## Entity analytics warning
 
-### Mentions
-- `getMentions(filters)`
-
-### Mailing Lists
-- `getMailingLists()`
-- `inviteMailingListMember(listId, invite)`
-
-### Entity Analytics
-- `getEntityBrief(term, campaignId?)` — one request: count + top-20 engagement sample with derived sentiment/platform
-- `getEntityStats(term, campaignId?)` — full dashboard: exact sentiment faceting, exact platform mix, 14-day cumulative-differenced timeline, 7d momentum
-- `getEntityBriefs(terms, campaignId?, concurrency?)` — batch entity resolution with bounded concurrency (default 20)
-- `getCampaignIdByMatch(substring)` — resolve a live campaign ID by matching its name
-
-### Low-Level
-- `get(path, params)` for direct GET access
-- `post(path, body)` for direct POST access
-
-## Filtering examples
+Entity analytics fan out multiple `/mentions/` requests per term. Use `cacheTtlMs`, `revalidateSeconds`, or a persistent shared cache to stay under the approximate 60 req/min API-key rate limit.
 
 ```ts
-await socialhose.getOverview({
-  campaign_ids: 'campaign-id',
-  date_from: '2026-05-01',
-  date_to: '2026-05-29',
-  platforms: 'twitter,reddit',
-  sentiments: 'negative',
-});
-
-await socialhose.getTimeline({
-  campaign_ids: 'campaign-id',
-  interval: 'day',
+const stats = await socialhose.getEntityStats('RSF', 'campaign-id', {
+  revalidateSeconds: 900,
 });
 ```
 
-## Custom Caching
-
-The SDK ships with `MemoryCache` (in-memory, per-entry TTL) and `NoopCache` (no caching). You can inject your own by implementing the `Cache` interface:
-
-```ts
-import { SocialhoseClient, Cache } from '@socialhose/api';
-
-class RedisCache implements Cache {
-  async get(key: string) { /* redis.get(key) */ }
-  async set(key: string, value: unknown, ttlMs: number) { /* redis.set(key, value, 'PX', ttlMs) */ }
-  async delete(key: string) { /* redis.del(key) */ }
-}
-
-const socialhose = new SocialhoseClient({
-  apiKey: process.env.SOCIALHOSE_API_KEY!,
-  cache: new RedisCache(),
-});
-```
-
-Pass `revalidateSeconds` per request to control per-call TTL in your cache implementation:
-
-```ts
-await socialhose.getMentions(
-  { content_search: 'ozempic' },
-  { revalidateSeconds: 3600 },
-);
-```
-
-## Entity Analytics
-
-Search across all mentions for a specific term, person, or organization:
-
-```ts
-// Quick count + top mentions
-const brief = await socialhose.getEntityBrief('Burhan');
-console.log(brief.total, brief.sentiment, brief.platformMix);
-
-// Full dashboard: exact distributions, timeline, momentum
-const stats = await socialhose.getEntityStats('RSF', 'campaign-id');
-console.log(
-  stats.total,
-  stats.momentumPct,   // last 7 days vs prior 7
-  stats.sentiment,      // exact (facets reconcile) or estimated (from sample)
-  stats.sparkline,      // 14-day daily volume
-);
-
-// Batch resolve many entities with bounded concurrency
-const briefs = await socialhose.getEntityBriefs(
-  ['Burhan', 'Hemedti', 'SAF', 'RSF'],
-  'campaign-id',
-  10, // concurrency
-);
-```
-
-Entity analytics fan out multiple requests per entity (sentiment faceting: 3 calls; platform mix: 6 calls; timeline: 15 calls). Set `cacheTtlMs` or inject a persistent cache to stay under the ~60 req/min rate limit.
-
-## Pitfalls
-
-**Cloudflare UA blocking.** The Socialhose API sits behind Cloudflare, which rejects some non-browser User-Agent headers. The SDK defaults to a Chrome 124 UA — don't change it unless you've verified the new UA works.
-
-**Entity timeline uses cumulative differencing.** The analytics timeline endpoint is campaign-scoped and ignores `content_search`. The SDK facets `/mentions/` by day using cumulative `date_from`-only queries and subtracts consecutive counts. This avoids the API's `date_to` inclusivity bug: overlapping `[date_from, date_to]` windows share a day and double-count it. Don't "simplify" this to day windows.
-
-**Sentiment reconciliation checks.** The `getEntityStats` exact sentiment and platform distributions validate that facet counts reconcile with the known total (e.g., positive + negative + neutral === total). If they don't match, the API silently dropped the `content_search` filter — the SDK falls back to estimates from the brief's sample rather than showing wrong data.
-
-**Rate limit ~60 req/min per API key.** Entity analytics fan out many parallel requests. Use the `cache` option with a persistent store (Redis, Next.js Data Cache) to keep warm loads under the limit.
-
-**Never expose the API key to the browser.** This SDK is designed for server-side use. Always set `SOCIALHOSE_API_KEY` as a server-side environment variable.
-
 ## Errors
 
-Failed requests throw `SocialhoseError` with `status`, `path`, and response `body` when available.
+Failed requests throw `SocialhoseError` with `status`, `path`, `body`, and `cause` when available.
 
 ```ts
 import { SocialhoseError } from '@socialhose/api';
@@ -176,12 +88,17 @@ try {
 }
 ```
 
-## Publishing
+## Development
 
 ```bash
+pnpm install
 pnpm test
 pnpm typecheck
 pnpm build
-npm publish --access public --provenance
 ```
 
+Publishing:
+
+```bash
+npm publish --access public --provenance
+```
diff --git a/sdks/javascript/docs/API.md b/sdks/javascript/docs/API.md
new file mode 100644
index 0000000..246e8a5
--- /dev/null
+++ b/sdks/javascript/docs/API.md
@@ -0,0 +1,366 @@
+# API Reference
+
+Public API reference for `@socialhose/api`, the TypeScript SDK for the Socialhose Public API.
+
+The SDK is intended for server-side JavaScript/TypeScript. It authenticates requests with an API key, wraps Socialhose REST endpoints, normalizes common response shapes, retries transient failures, applies request timeouts, and caches GET responses.
+
+## Package exports
+
+```ts
+import {
+  SocialhoseClient,
+  createSocialhoseClient,
+  SocialhoseError,
+  MemoryCache,
+  NoopCache,
+  type Cache,
+  type SocialhoseClientOptions,
+  type RequestOptions,
+  type AnalyticsFilters,
+  type MentionFilters,
+} from '@socialhose/api';
+```
+
+## Authentication
+
+Every request sends:
+
+- `Authorization: Api-Key <apiKey>`
+- `Accept: application/json`
+- a browser-like `User-Agent` by default
+- `Content-Type: application/json` for `POST`
+
+Do not use this SDK directly in browser code. Keep `SOCIALHOSE_API_KEY` on the server.
+
+## `SocialhoseClientOptions`
+
+Configuration object for `new SocialhoseClient(options)` and `createSocialhoseClient(options)`.
+
+- `apiKey: string` — Socialhose API key. Required; empty strings fail on first request.
+- `baseUrl?: string` — API root. Default: `https://socialhose.net/api/public/v1`.
+- `userAgent?: string` — request user-agent. Default is Chrome-like because the API edge may reject generic Node clients.
+- `fetch?: typeof fetch` — custom fetch implementation for tests, instrumentation, or runtimes without global fetch.
+- `timeoutMs?: number` — per-attempt timeout. Default: `8000`.
+- `retries?: number` — retry count after the first attempt. Default: `3`.
+- `retryDelayMs?: (attempt: number) => number` — retry backoff function. Default: exponential backoff with jitter.
+- `cacheTtlMs?: number` — default GET cache TTL in milliseconds. Default: `60000`; set `0` to disable the built-in memory cache.
+- `cache?: Cache` — custom cache implementation. If supplied, it replaces the internal cache.
+- `defaultHeaders?: Record<string, string>` — extra headers sent with every request.
+
+## `RequestOptions`
+
+Per-request options.
+
+- `revalidateSeconds?: number` — override cache TTL for this call, in seconds. Passed only to `Cache.set`; not sent to the API.
+- `signal?: AbortSignal` — caller abort signal combined with the SDK timeout.
+- `headers?: Record<string, string>` — request-specific headers.
+
+## `new SocialhoseClient(options)`
+
+Creates an authenticated API client.
+
+```ts
+const socialhose = new SocialhoseClient({
+  apiKey: process.env.SOCIALHOSE_API_KEY!,
+  timeoutMs: 8_000,
+  retries: 3,
+  cacheTtlMs: 60_000,
+});
+```
+
+## `createSocialhoseClient(options)`
+
+Factory wrapper around the constructor.
+
+```ts
+const socialhose = createSocialhoseClient({ apiKey });
+```
+
+Returns `SocialhoseClient`.
+
+## Low-level HTTP methods
+
+### `client.get<T>(path, params?, options?)`
+
+Performs an authenticated cached GET request.
+
+- `path: string` — endpoint path, with or without leading slash.
+- `params?: QueryParams` — query parameters. `undefined`, `null`, and `''` values are omitted.
+- `options?: RequestOptions` — cache TTL, abort signal, and extra headers.
+
+Returns `Promise<T>`.
+
+Behavior:
+
+- Builds the URL from `baseUrl`, `path`, and `params`.
+- Uses the full URL as the cache key.
+- Retries network errors, timeouts, `429`, and `5xx` responses.
+- Throws `SocialhoseError` for non-OK responses after retries.
+
+### `client.post<T>(path, body, options?)`
+
+Performs an authenticated JSON POST request.
+
+- `path: string` — endpoint path.
+- `body: unknown` — JSON-serialized request body.
+- `options?: RequestOptions` — abort signal and extra headers.
+
+Returns `Promise<{ status: number; data: T | null }>`.
+
+Behavior:
+
+- Never uses the GET cache.
+- Sends `Content-Type: application/json`.
+- Returns the HTTP status so higher-level methods can normalize status-specific outcomes.
+- Lets POST `409` responses through for conflict normalization.
+
+## Campaign methods
+
+### `client.getCampaigns(options?)`
+
+Fetches first-page campaigns.
+
+Endpoint: `GET /campaigns/?page=1`
+
+Returns `Promise<Campaign[]>`.
+
+Use it to list accessible campaigns or populate campaign selectors. The helper reads page 1 only; use `get<Paginated<Campaign>>()` for manual pagination.
+
+### `client.getCampaign(id, options?)`
+
+Fetches one campaign by ID.
+
+Endpoint: `GET /campaigns/{id}/`
+
+Returns `Promise<Campaign>`.
+
+Throws `SocialhoseError` when the campaign is missing or inaccessible.
+
+### `client.getCampaignIdByMatch(match, options?)`
+
+Returns the first campaign ID whose name contains `match`, case-insensitively.
+
+Returns `Promise<string | undefined>`.
+
+If campaign fetching fails or no campaign matches, returns `undefined`. Use exact IDs when names may collide.
+
+## Analytics filters
+
+`AnalyticsFilters` are passed through as query params:
+
+- `campaign_ids?: string` — one ID or comma-separated IDs.
+- `date_from?: string` — lower date bound, commonly `YYYY-MM-DD`.
+- `date_to?: string` — upper date bound, commonly `YYYY-MM-DD`.
+- `platforms?: string` — platform or comma-separated platforms.
+- `sentiments?: string` — sentiment or comma-separated sentiments.
+
+## Analytics methods
+
+### `client.getOverview(filters?, options?)`
+
+Endpoint: `GET /analytics/overview/`
+
+Returns `Promise<Overview>` with total mentions, authors, estimated reach, sentiment distribution, platform breakdown, engagement, and growth metrics.
+
+The SDK coerces `total_mentions` and `total_authors` to numbers because some API responses may return numeric strings.
+
+### `client.getTimeline(filters?, options?)`
+
+Endpoint: `GET /analytics/timeline/`
+
+Filters include `interval?: 'day' | 'week' | 'month'`, defaulting to `day`.
+
+Returns `Promise<TimelinePoint[]>`. If the API response lacks `series`, returns `[]`.
+
+### `client.getSentiment(filters?, options?)`
+
+Endpoint: `GET /analytics/sentiment/`
+
+Returns `Promise<{ distribution: SentimentSplit; by_platform: Record<string, SentimentSplit> }>`.
+
+### `client.getShareOfVoice(filters?, options?)`
+
+Endpoint: `GET /analytics/share-of-voice/`
+
+Returns `Promise<{ total_mentions: number; campaigns: ShareOfVoiceItem[] }>`.
+
+Each campaign row includes mention count, share percentage, engagement, and sentiment.
+
+### `client.getPlatforms(filters?, options?)`
+
+Endpoint: `GET /analytics/platforms/`
+
+Returns `Promise<PlatformStat[]>`. If the API response lacks `platforms`, returns `[]`.
+
+### `client.getTopKeywords(filters?, options?)`
+
+Endpoint: `GET /analytics/top-keywords/`
+
+Filters include `limit?: number`, defaulting to `12`.
+
+Returns `Promise<KeywordStat[]>`. If the API response lacks `keywords`, returns `[]`.
+
+### `client.getTrending(filters?, options?)`
+
+Endpoint: `GET /analytics/trending/`
+
+Filters include `limit?: number`, defaulting to `8`.
+
+Returns `Promise<TrendingItem[]>`. If the API response lacks `trending`, returns `[]`.
+
+### `client.getTopMentions(filters?, options?)`
+
+Endpoint: `GET /analytics/top-mentions/`
+
+Filters include `limit?: number`, defaulting to `6`.
+
+Returns `Promise<TopMention[]>`. If the API response lacks `mentions`, returns `[]`.
+
+## Mention methods
+
+### `client.getMentions(filters?, optionsOrRevalidate?)`
+
+Endpoint: `GET /mentions/`
+
+Returns `Promise<Paginated<Mention>>`.
+
+`MentionFilters` include all `AnalyticsFilters` plus:
+
+- `page?: number` — page number, defaulting to `1`.
+- `content_search?: string` — text search term.
+- `ordering?: string` — sort key, such as `-published_at` or `-engagement_count`.
+
+The second argument may be `RequestOptions` or the legacy shorthand `number` for `revalidateSeconds`.
+
+## Mailing-list methods
+
+### `client.getMailingLists(options?)`
+
+Endpoint: `GET /mailing-lists/?page=1`
+
+Returns `Promise<MailingList[]>` from the first page.
+
+### `client.inviteMailingListMember(listId, invite, options?)`
+
+Endpoint: `POST /mailing-lists/{listId}/members/`
+
+`invite` fields:
+
+- `email: string`
+- `first_name?: string`
+- `last_name?: string`
+- `invitation_message?: string`
+
+Returns `Promise<InviteResult>`:
+
+- `{ outcome: 'invited', invitation }` for `201` plus `status: 'invited'`.
+- `{ outcome: 'already', detail }` for `409` conflicts.
+- `{ outcome: 'error', detail }` for unexpected successful/conflict response shapes.
+
+Other non-OK statuses throw `SocialhoseError`.
+
+## Entity analytics methods
+
+Entity analytics are SDK-composed views built on `/mentions/` with `content_search`. They provide term/person/org/topic analytics when native analytics endpoints are campaign-scoped.
+
+### `client.getEntityBrief(term, campaignId?, options?)`
+
+Runs one mention search ordered by engagement.
+
+Returns `Promise<EntityBrief>`:
+
+- `term` — requested search term.
+- `total` — exact API count.
+- `exact` — true when the sample covers the full population.
+- `sentiment` — sample-derived sentiment split.
+- `platformMix` — sample-derived platform counts.
+- `sample` — first page ordered by engagement.
+
+`total` is exact. Sentiment and platform mix are exact only when `exact` is true.
+
+### `client.getEntityStats(term, campaignId?, options?)`
+
+Builds a richer dashboard for one term.
+
+Returns `Promise<EntityStats>` with `EntityBrief` fields plus:
+
+- `recent` — newest mentions.
+- `recent7d` — latest seven-day count from the sparkline.
+- `prev7d` — previous seven-day count.
+- `momentumPct` — seven-day percentage change, or `null` if not computable.
+- `sparkline` — daily counts for the last 14 days when date faceting is trustworthy.
+
+Failure model:
+
+- The initial brief must succeed.
+- Follow-up subrequests are best-effort.
+- Exact facets are used only when reconciliation checks pass; otherwise sample-derived values are retained.
+
+### `client.getEntityBriefs(terms, campaignId?, concurrency?, options?)`
+
+Fetches many entity briefs with bounded concurrency.
+
+Returns `Promise<Map<string, EntityBrief>>`.
+
+Failed terms are omitted from the map. Default concurrency is `20`; reduce it under rate limits.
+
+## Cache API
+
+### `Cache`
+
+```ts
+interface Cache {
+  get(key: string): Promise<unknown | undefined>;
+  set(key: string, value: unknown, ttlMs: number): Promise<void>;
+  delete(key: string): Promise<void>;
+}
+```
+
+The key is the full GET URL. `get()` returns `undefined` on cache miss. `ttlMs` is in milliseconds.
+
+### `MemoryCache`
+
+In-memory `Map` cache with per-entry TTL. Good for tests, scripts, and single-process services. Not enough for distributed rate-limit protection.
+
+### `NoopCache`
+
+Cache implementation that never stores values. Use it to force fresh data or disable caching explicitly.
+
+### `client.clearCache()`
+
+Deletes cache keys used by the current client instance. It is not a global purge for shared cache backends.
+
+## `SocialhoseError`
+
+Structured request failure.
+
+Fields:
+
+- `name: 'SocialhoseError'`
+- `status?: number`
+- `path: string`
+- `body?: string`
+- `cause?: unknown`
+
+Thrown after retry exhaustion or unsupported non-OK HTTP responses.
+
+## Core data types
+
+- `Sentiment` — `'positive' | 'negative' | 'neutral'`.
+- `SentimentSplit` — `{ positive: number; negative: number; neutral: number }`.
+- `Paginated<T>` — `{ count, next, previous, results }`.
+- `Campaign` — campaign metadata.
+- `Overview` — aggregate analytics.
+- `TimelinePoint` — one time-series bucket.
+- `ShareOfVoiceItem` — campaign comparison row.
+- `PlatformStat` — platform count and engagement.
+- `KeywordStat` — keyword count and sentiment.
+- `TrendingItem` — keyword momentum.
+- `TopMention` — compact high-impact mention.
+- `Mention` — full mention record with content, engagement, metadata, and author profile.
+- `MailingList` — mailing-list metadata.
+- `MailingListInvitation` — mailing-list invitation state.
+- `InviteResult` — normalized invite result.
+- `PlatformShare` — entity analytics platform count.
+- `EntityBrief` — compact term analytics.
+- `EntityStats` — full term dashboard.
diff --git a/sdks/javascript/docs/CACHING_AND_RETRIES.md b/sdks/javascript/docs/CACHING_AND_RETRIES.md
new file mode 100644
index 0000000..9299fb7
--- /dev/null
+++ b/sdks/javascript/docs/CACHING_AND_RETRIES.md
@@ -0,0 +1,104 @@
+# Caching, Retries, and Failure Semantics
+
+## GET lifecycle
+
+1. Build full URL from `baseUrl`, `path`, and query params.
+2. Check cache by full URL.
+3. Fetch with auth headers and timeout on cache miss.
+4. Retry network errors, timeout errors, `429`, and `5xx`.
+5. Parse JSON.
+6. Throw `SocialhoseError` for unsupported non-OK responses.
+7. Store successful parsed response in cache.
+
+## POST lifecycle
+
+1. Build URL.
+2. Fetch JSON body with auth headers and timeout.
+3. Retry network errors, timeout errors, `429`, and `5xx`.
+4. Parse JSON.
+5. Return `{ status, data }`.
+6. Never cache.
+
+## Retry policy
+
+Defaults:
+
+```ts
+retries: 3,
+retryDelayMs: (attempt) => 400 * 2 ** attempt + Math.random() * 200,
+timeoutMs: 8_000,
+```
+
+Retries apply to transient conditions only:
+
+- network failures
+- SDK timeout/abort failures
+- `429 Too Many Requests`
+- `5xx` server errors
+
+Retries do not apply to normal client errors such as `400`, `401`, `403`, and `404`.
+
+## Cache contract
+
+```ts
+interface Cache {
+  get(key: string): Promise<unknown | undefined>;
+  set(key: string, value: unknown, ttlMs: number): Promise<void>;
+  delete(key: string): Promise<void>;
+}
+```
+
+The cache key is the full request URL. `ttlMs` is in milliseconds and comes from `cacheTtlMs` or per-request `revalidateSeconds`.
+
+## Redis-style cache example
+
+```ts
+import { SocialhoseClient, type Cache } from '@socialhose/api';
+
+class RedisJsonCache implements Cache {
+  constructor(private redis: {
+    get(k: string): Promise<string | null>;
+    set(k: string, v: string, mode: 'PX', ttl: number): Promise<unknown>;
+    del(k: string): Promise<unknown>;
+  }) {}
+
+  async get(key: string) {
+    const value = await this.redis.get(key);
+    return value == null ? undefined : JSON.parse(value);
+  }
+
+  async set(key: string, value: unknown, ttlMs: number) {
+    if (ttlMs <= 0) return;
+    await this.redis.set(key, JSON.stringify(value), 'PX', ttlMs);
+  }
+
+  async delete(key: string) {
+    await this.redis.del(key);
+  }
+}
+
+const socialhose = new SocialhoseClient({
+  apiKey: process.env.SOCIALHOSE_API_KEY!,
+  cache: new RedisJsonCache(redis),
+});
+```
+
+## Method failure semantics
+
+Campaign, analytics, mention, and list methods:
+
+- Throw `SocialhoseError` after retry exhaustion or unsupported non-OK responses.
+- Return normalized arrays when the API wraps arrays in properties such as `series`, `platforms`, or `keywords`.
+
+`inviteMailingListMember()`:
+
+- `201 + status: invited` -> `outcome: 'invited'`.
+- `409` -> `outcome: 'already'`.
+- Unexpected success/conflict shapes -> `outcome: 'error'`.
+- Other non-OK statuses throw.
+
+Entity methods:
+
+- `getEntityBrief()` throws if the mention search fails.
+- `getEntityStats()` requires the initial brief but treats later subrequests as best-effort.
+- `getEntityBriefs()` skips failed terms and returns successful entries.
diff --git a/sdks/javascript/docs/ENTITY_ANALYTICS.md b/sdks/javascript/docs/ENTITY_ANALYTICS.md
new file mode 100644
index 0000000..1a4de61
--- /dev/null
+++ b/sdks/javascript/docs/ENTITY_ANALYTICS.md
@@ -0,0 +1,85 @@
+# Entity Analytics
+
+Entity analytics are SDK-composed analytics for a single term, person, organization, hashtag, product, or incident.
+
+They exist because Socialhose analytics endpoints are campaign-scoped, while `/mentions/` supports `content_search` and returns an exact `count`.
+
+## `getEntityBrief()`
+
+`getEntityBrief(term, campaignId?)` performs one mention search ordered by engagement.
+
+It returns:
+
+- exact total mention count
+- top mention sample
+- sample-derived sentiment split
+- sample-derived platform mix
+- `exact` flag indicating whether the sample covers the full population
+
+This is cheap enough for grids, tables, and autocomplete-like entity lists.
+
+## `getEntityStats()`
+
+`getEntityStats(term, campaignId?)` expands a brief into a detail dashboard.
+
+It fetches:
+
+- engagement-ordered sample
+- newest mentions
+- sentiment facets
+- platform facets
+- cumulative date boundaries for a 14-day sparkline
+
+The first brief request is required. Subrequests are best-effort; failures return fallbacks instead of zeroing out the entity.
+
+## Accuracy safeguards
+
+### Sentiment reconciliation
+
+The SDK facets `/mentions/` by sentiment and accepts exact sentiment only when:
+
+```txt
+positive + negative + neutral === total
+```
+
+If the sum does not match, the SDK assumes a filter was ignored or misapplied and falls back to sample-derived sentiment.
+
+### Platform reconciliation
+
+The SDK facets `/mentions/` over known platform keys. If the platform facet sum exceeds the entity total, the SDK assumes the API ignored a filter and falls back to sample-derived platform mix.
+
+A sum below total is allowed because some mentions may be on platforms outside the SDK's known list.
+
+### Timeline cumulative differencing
+
+The SDK avoids adjacent `[date_from, date_to]` daily windows because inclusive `date_to` can double-count boundary days.
+
+Instead it requests cumulative counts with `date_from` only:
+
+```txt
+count(on/after day N) - count(on/after day N+1) = day N count
+```
+
+If the earliest cumulative count exceeds the known entity total, the SDK treats date-filtered `content_search` as untrustworthy and returns an empty sparkline rather than wrong bars.
+
+## Rate-limit guidance
+
+A single `getEntityStats()` can perform approximately:
+
+- 1 brief request
+- 1 recent request
+- 3 sentiment facet requests
+- 6 platform facet requests
+- 15 timeline boundary requests
+
+Use caching and keep batch concurrency low.
+
+Recommended pattern:
+
+```ts
+const stats = await socialhose.getEntityStats('cholera', campaignId, {
+  revalidateSeconds: 900,
+});
+```
+
+Use `getEntityBriefs()` for lists and call `getEntityStats()` only for selected detail views.
diff --git a/sdks/javascript/docs/GUIDE.md b/sdks/javascript/docs/GUIDE.md
new file mode 100644
index 0000000..e29c274
--- /dev/null
+++ b/sdks/javascript/docs/GUIDE.md
@@ -0,0 +1,173 @@
+# Usage Guide
+
+## What this SDK is
+
+`@socialhose/api` is a TypeScript client for the Socialhose Public API. It is built for backend services, scripts, serverless functions, and dashboards that need campaign analytics, mention search, mailing-list management, and term-level entity analytics.
+
+The SDK handles:
+
+1. API-key authentication.
+2. Typed endpoint helpers.
+3. Timeouts, retries, and request cancellation.
+4. GET caching with an injectable cache interface.
+5. Entity analytics assembled from `/mentions/` when native analytics endpoints are campaign-scoped.
+
+## Install
+
+```bash
+npm install @socialhose/api
+```
+
+Requires Node 18+ or a custom `fetch` implementation.
+
+## Basic setup
+
+```ts
+import { SocialhoseClient } from '@socialhose/api';
+
+const socialhose = new SocialhoseClient({
+  apiKey: process.env.SOCIALHOSE_API_KEY!,
+});
+```
+
+Keep the API key server-side. Do not instantiate this client in browser code.
+
+## Production setup
+
+```ts
+const socialhose = new SocialhoseClient({
+  apiKey: process.env.SOCIALHOSE_API_KEY!,
+  timeoutMs: 10_000,
+  retries: 3,
+  cacheTtlMs: 60_000,
+});
+```
+
+Recommendations:
+
+- Keep the default browser-like user-agent unless you have verified an alternative works.
+- Use a shared cache such as Redis for multi-process or serverless deployments.
+- Reduce entity batch concurrency if you see `429` responses.
+- Use `revalidateSeconds` for dashboards so repeated views do not fan out fresh requests.
+
+## List campaigns
+
+```ts
+const campaigns = await socialhose.getCampaigns();
+for (const campaign of campaigns) {
+  console.log(campaign.id, campaign.name, campaign.status);
+}
+```
+
+## Search mentions
+
+```ts
+const page = await socialhose.getMentions({
+  campaign_ids: 'campaign-id',
+  content_search: 'hospital',
+  platforms: 'twitter,reddit',
+  sentiments: 'negative',
+  ordering: '-published_at',
+});
+
+console.log(page.count);
+console.log(page.results[0]?.content);
+```
+
+## Fetch campaign dashboard analytics
+
+```ts
+const filters = { campaign_ids: 'campaign-id', date_from: '2026-05-01' };
+
+const [overview, timeline, sentiment, platforms, topMentions] = await Promise.all([
+  socialhose.getOverview(filters),
+  socialhose.getTimeline({ ...filters, interval: 'day' }),
+  socialhose.getSentiment(filters),
+  socialhose.getPlatforms(filters),
+  socialhose.getTopMentions({ ...filters, limit: 10 }),
+]);
+```
+
+## Analyze a term or entity
+
+```ts
+const stats = await socialhose.getEntityStats('RSF', 'campaign-id', {
+  revalidateSeconds: 900,
+});
+
+console.log({
+  total: stats.total,
+  sentiment: stats.sentiment,
+  platformMix: stats.platformMix,
+  momentumPct: stats.momentumPct,
+  topUrls: stats.sample.slice(0, 3).map((m) => m.url),
+});
+```
+
+Use `getEntityBrief()` for cheap cards/lists and `getEntityStats()` for detail pages.
+
+## Batch entity briefs
+
+```ts
+const briefs = await socialhose.getEntityBriefs(
+  ['Burhan', 'Hemedti', 'SAF', 'RSF'],
+  'campaign-id',
+  5,
+  { revalidateSeconds: 3600 },
+);
+```
+
+Failed terms are skipped. Lower concurrency if rate limits are visible.
+
+## Pagination
+
+`getCampaigns()` and `getMailingLists()` return first-page arrays. `getMentions()` exposes a `page` filter.
+
+For manual pagination, use `get()`:
+
+```ts
+let page = 1;
+while (true) {
+  const response = await socialhose.get('/mentions/', { page, content_search: 'cholera' });
+  // process response.results
+  if (!response.next) break;
+  page += 1;
+}
+```
+
+## Error handling
+
+```ts
+import { SocialhoseError } from '@socialhose/api';
+
+try {
+  await socialhose.getOverview({ campaign_ids: 'bad-id' });
+} catch (error) {
+  if (error instanceof SocialhoseError) {
+    console.error({ status: error.status, path: error.path, body: error.body });
+  } else {
+    throw error;
+  }
+}
+```
+
+## Caching
+
+GET requests are cached; POST requests are not.
+
+```ts
+await socialhose.getMentions(
+  { content_search: 'sudan' },
+  { revalidateSeconds: 900 },
+);
+```
+
+The default cache is process-local. Use a persistent/shared cache for production dashboards and rate-limit control.
+
+## Operational pitfalls
+
+- Entity analytics are request-heavy. One `getEntityStats()` call can issue roughly 20+ requests.
+- The API rate limit is roughly 60 requests/minute per API key.
+- The entity timeline uses cumulative differencing intentionally to avoid inclusive `date_to` double-counting.
+- Exact entity sentiment/platform values are used only when facet counts reconcile with the known total.
+- `409` mailing-list conflicts are normalized to `{ outcome: 'already' }`; other non-OK responses throw.
diff --git a/sdks/javascript/examples/basic.ts b/sdks/javascript/examples/basic.ts
new file mode 100644
index 0000000..042b3ff
--- /dev/null
+++ b/sdks/javascript/examples/basic.ts
@@ -0,0 +1,29 @@
+import { SocialhoseClient, SocialhoseError } from '@socialhose/api';
+
+const socialhose = new SocialhoseClient({
+  apiKey: process.env.SOCIALHOSE_API_KEY!,
+});
+
+try {
+  const campaigns = await socialhose.getCampaigns();
+  const campaignId = campaigns[0]?.id;
+
+  const mentions = await socialhose.getMentions({
+    campaign_ids: campaignId,
+    content_search: 'hospital',
+    ordering: '-published_at',
+  });
+
+  console.log({
+    campaigns: campaigns.length,
+    mentionCount: mentions.count,
+    firstMention: mentions.results[0]?.url,
+  });
+} catch (error) {
+  if (error instanceof SocialhoseError) {
+    console.error({ status: error.status, path: error.path, body: error.body });
+    process.exitCode = 1;
+  } else {
+    throw error;
+  }
+}
diff --git a/sdks/javascript/examples/entity-dashboard.ts b/sdks/javascript/examples/entity-dashboard.ts
new file mode 100644
index 0000000..53f8adc
--- /dev/null
+++ b/sdks/javascript/examples/entity-dashboard.ts
@@ -0,0 +1,26 @@
+import { SocialhoseClient } from '@socialhose/api';
+
+const socialhose = new SocialhoseClient({
+  apiKey: process.env.SOCIALHOSE_API_KEY!,
+  cacheTtlMs: 15 * 60 * 1000,
+});
+
+const campaignId = process.argv[2];
+const term = process.argv[3] ?? 'RSF';
+
+const stats = await socialhose.getEntityStats(term, campaignId, {
+  revalidateSeconds: 15 * 60,
+});
+
+console.log(JSON.stringify({
+  term: stats.term,
+  total: stats.total,
+  exact: stats.exact,
+  sentiment: stats.sentiment,
+  platformMix: stats.platformMix,
+  recent7d: stats.recent7d,
+  prev7d: stats.prev7d,
+  momentumPct: stats.momentumPct,
+  sparkline: stats.sparkline,
+  topUrls: stats.sample.slice(0, 5).map((m) => m.url),
+}, null, 2));
diff --git a/sdks/javascript/package.json b/sdks/javascript/package.json
index 05b1dd0..5181475 100644
--- a/sdks/javascript/package.json
+++ b/sdks/javascript/package.json
@@ -7,6 +7,8 @@
   "sideEffects": false,
   "files": [
     "dist",
+    "docs",
+    "examples",
     "README.md",
     "LICENSE"
   ],
diff --git a/sdks/javascript/src/cache.ts b/sdks/javascript/src/cache.ts
index 50f8b04..3ae20fd 100644
--- a/sdks/javascript/src/cache.ts
+++ b/sdks/javascript/src/cache.ts
@@ -1,12 +1,22 @@
+/**
+ * Pluggable cache contract used by SocialhoseClient for GET responses.
+ * The SDK uses the full request URL as the key.
+ */
 export interface Cache {
+  /** Return a cached value, or `undefined` on miss/expiry. */
   get(key: string): Promise<unknown | undefined>;
+  /** Store a value for the given TTL in milliseconds. */
   set(key: string, value: unknown, ttlMs: number): Promise<void>;
+  /** Delete one cache entry. */
   delete(key: string): Promise<void>;
 }
 
 type Entry = { at: number; value: unknown; ttlMs: number };
 
-/** In-memory Map-backed cache with per-entry TTL. */
+/**
+ * In-memory Map-backed cache with per-entry TTL.
+ * Best for tests, scripts, and single-process services.
+ */
 export class MemoryCache implements Cache {
   private readonly map = new Map<string, Entry>();
 
@@ -29,7 +39,7 @@ export class MemoryCache implements Cache {
   }
 }
 
-/** No-op cache — all operations are no-ops; useful for disabling caching. */
+/** Cache implementation that never stores values; useful for disabling caching. */
 export class NoopCache implements Cache {
   async get(_key: string): Promise<undefined> {
     return undefined;
diff --git a/sdks/javascript/src/index.ts b/sdks/javascript/src/index.ts
index 78790f0..0228e75 100644
--- a/sdks/javascript/src/index.ts
+++ b/sdks/javascript/src/index.ts
@@ -2,11 +2,13 @@ export type { Cache } from './cache';
 export { MemoryCache, NoopCache } from './cache';
 import { type Cache, MemoryCache, NoopCache } from './cache';
 
+/** Sentiment label assigned to a mention by Socialhose. */
 export type Sentiment = 'positive' | 'negative' | 'neutral';
 export type SentimentSplit = { positive: number; negative: number; neutral: number };
 export type QueryValue = string | number | boolean | null | undefined;
 export type QueryParams = Record<string, QueryValue>;
 
+/** Configuration for {@link SocialhoseClient}. */
 export interface SocialhoseClientOptions {
   apiKey: string;
   baseUrl?: string;
@@ -21,6 +23,7 @@ export interface SocialhoseClientOptions {
   defaultHeaders?: Record<string, string>;
 }
 
+/** Per-call controls for cache TTL, cancellation, and extra headers. */
 export interface RequestOptions {
   /**
    * Reserved for cache-implementation use; not forwarded to fetch.
@@ -226,6 +229,7 @@ export interface EntityStats extends EntityBrief {
   sparkline: { date: string; count: number }[];
 }
 
+/** Structured error thrown for failed Socialhose requests. */
 export class SocialhoseError extends Error {
   readonly status?: number;
   readonly path: string;
@@ -312,6 +316,7 @@ function platformMixOf(mentions: Mention[]): PlatformShare[] {
     .sort((a, b) => b.count - a.count);
 }
 
+/** Authenticated server-side client for the Socialhose Public API. */
 export class SocialhoseClient {
   readonly apiKey: string;
   readonly baseUrl: string;
@@ -326,6 +331,7 @@ export class SocialhoseClient {
   private readonly cacheImpl: Cache;
   private readonly usedCacheKeys = new Set<string>();
 
+  /** Create a client with authentication, retry, timeout, and cache settings. */
   constructor(options: SocialhoseClientOptions) {
     if (!options.fetch && typeof fetch === 'undefined') throw new Error('A fetch implementation is required');
     this.apiKey = options.apiKey;
@@ -340,12 +346,14 @@ export class SocialhoseClient {
     this.cacheImpl = options.cache ?? (this.cacheTtlMs > 0 ? new MemoryCache() : new NoopCache());
   }
 
+  /** Delete cache entries used by this client instance. */
   async clearCache(): Promise<void> {
     const keys = [...this.usedCacheKeys];
     this.usedCacheKeys.clear();
     await Promise.all(keys.map((k) => this.cacheImpl.delete(k)));
   }
 
+  /** Perform an authenticated cached GET request. */
   async get<T>(path: string, params: QueryParams = {}, options: RequestOptions = {}): Promise<T> {
     const query = encodeParams(params);
     const url = `${joinUrl(this.baseUrl, path)}${query ? `?${query}` : ''}`;
@@ -360,20 +368,24 @@ export class SocialhoseClient {
     return value;
   }
 
+  /** Perform an authenticated JSON POST request. */
   async post<T>(path: string, body: unknown, options: RequestOptions = {}): Promise<{ status: number; data: T | null }> {
     const url = joinUrl(this.baseUrl, path);
     return this.requestWithStatus<T>('POST', path, url, body, options);
   }
 
+  /** Fetch the first page of campaigns. */
   async getCampaigns(options: RequestOptions = {}): Promise<Campaign[]> {
     const d = await this.get<Paginated<Campaign>>('/campaigns/', { page: 1 }, options);
     return d.results;
   }
 
+  /** Fetch a single campaign by ID. */
   getCampaign(id: string, options: RequestOptions = {}): Promise<Campaign> {
     return this.get<Campaign>(`/campaigns/${id}/`, {}, options);
   }
 
+  /** Fetch aggregate overview analytics. */
   async getOverview(filters: AnalyticsFilters = {}, options: RequestOptions = {}): Promise<Overview> {
     const d = await this.get<Overview>('/analytics/overview/', filters as QueryParams, options);
     return { ...d, total_mentions: num(d.total_mentions), total_authors: num(d.total_authors) };
@@ -745,6 +757,7 @@ export class SocialhoseClient {
   }
 }
 
+/** Create a {@link SocialhoseClient}; convenience wrapper around the constructor. */
 export function createSocialhoseClient(options: SocialhoseClientOptions): SocialhoseClient {
   return new SocialhoseClient(options);
 }