feat(CF-2885): Add Jira as timeline source — pulls issue history via REST API

Extends timeline() with Jira integration since sessions moved to Jira-only in
CF-836 (2026-02-08) and the session-mcp tables are empty by design.

Adds to services/jira.ts:
- getIssueWithHistory(key): fetches issue with expand=changelog + comments
- searchIssueKeys(jql): JQL search returning minimal issue keys
- ADF → plain text extractor for comment bodies

Timeline now yields Jira events: issue_created, field_change:{status,assignee,
resolution,priority,labels}, comment. Events are time-filtered client-side
against the since/until window. For Jira-key subjects, also searches for
linked session-tracking issues and merges their events.

Tested against CF-2872 (audit task) and CF-2885 (this ticket) — shows full
lifecycle from creation through transitions to resolution.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/services/jira.ts

@@ -255,6 +255,156 @@ export async function updateIssueDescription(issueKey: string, description: stri
   }
 }
 
+// ---------- Read operations (CF-2885 timeline tool) ----------
+
+export interface JiraChangelogEntry {
+  ts: string;               // ISO8601
+  author: string;
+  field: string;            // e.g. "status", "assignee", "labels"
+  from: string | null;
+  to: string | null;
+}
+
+export interface JiraComment {
+  id: string;
+  ts: string;
+  author: string;
+  body: string;
+}
+
+export interface JiraIssueHistory {
+  key: string;
+  summary: string;
+  status: string;
+  issueType: string;
+  created: string;
+  creator: string;
+  labels: string[];
+  parent?: string;
+  linkedIssues: Array<{ key: string; type: string; direction: 'in' | 'out' }>;
+  changelog: JiraChangelogEntry[];
+  comments: JiraComment[];
+}
+
+function adfToPlainText(adf: unknown): string {
+  // Minimal Atlassian Document Format → plain text extractor.
+  if (!adf || typeof adf !== 'object') return '';
+  const node = adf as { type?: string; text?: string; content?: unknown[] };
+  if (node.text) return node.text;
+  if (Array.isArray(node.content)) {
+    return node.content.map(c => adfToPlainText(c)).join(' ').trim();
+  }
+  return '';
+}
+
+/**
+ * Fetch a Jira issue with full changelog and comments. Returns null on failure.
+ */
+export async function getIssueWithHistory(issueKey: string): Promise<JiraIssueHistory | null> {
+  if (!isConfigured()) return null;
+
+  try {
+    // Issue with changelog expansion
+    const issueResp = await jiraFetch(`/issue/${issueKey}?expand=changelog&fields=summary,status,issuetype,created,creator,labels,parent,issuelinks`);
+    if (!issueResp.ok) {
+      console.error(`session-mcp: Jira get issue failed (${issueResp.status}) for ${issueKey}`);
+      return null;
+    }
+    const issue = await issueResp.json() as any;
+
+    // Comments (separate endpoint for full data)
+    const commentsResp = await jiraFetch(`/issue/${issueKey}/comment?orderBy=created`);
+    const commentsJson = commentsResp.ok ? await commentsResp.json() as any : { comments: [] };
+
+    // Parse changelog histories → flat entries
+    const changelog: JiraChangelogEntry[] = [];
+    const histories = issue.changelog?.histories || [];
+    for (const h of histories) {
+      const author = h.author?.displayName || h.author?.emailAddress || 'unknown';
+      const ts = h.created;
+      for (const item of (h.items || [])) {
+        changelog.push({
+          ts,
+          author,
+          field: item.field,
+          from: item.fromString || item.from || null,
+          to: item.toString || item.to || null,
+        });
+      }
+    }
+
+    // Parse comments
+    const comments: JiraComment[] = (commentsJson.comments || []).map((c: any) => ({
+      id: c.id,
+      ts: c.created,
+      author: c.author?.displayName || c.author?.emailAddress || 'unknown',
+      body: adfToPlainText(c.body),
+    }));
+
+    // Parse linked issues
+    const linkedIssues: Array<{ key: string; type: string; direction: 'in' | 'out' }> = [];
+    for (const link of (issue.fields?.issuelinks || [])) {
+      if (link.outwardIssue) {
+        linkedIssues.push({
+          key: link.outwardIssue.key,
+          type: link.type?.outward || 'relates to',
+          direction: 'out',
+        });
+      } else if (link.inwardIssue) {
+        linkedIssues.push({
+          key: link.inwardIssue.key,
+          type: link.type?.inward || 'relates to',
+          direction: 'in',
+        });
+      }
+    }
+
+    return {
+      key: issue.key,
+      summary: issue.fields?.summary || '',
+      status: issue.fields?.status?.name || '',
+      issueType: issue.fields?.issuetype?.name || '',
+      created: issue.fields?.created || '',
+      creator: issue.fields?.creator?.displayName || issue.fields?.creator?.emailAddress || 'unknown',
+      labels: issue.fields?.labels || [],
+      parent: issue.fields?.parent?.key,
+      linkedIssues,
+      changelog,
+      comments,
+    };
+  } catch (err) {
+    console.error('session-mcp: Jira get issue history error:', err);
+    return null;
+  }
+}
+
+/**
+ * Search for issues via JQL. Returns array of issue keys (minimal projection).
+ */
+export async function searchIssueKeys(jql: string, limit: number = 50): Promise<string[]> {
+  if (!isConfigured()) return [];
+
+  try {
+    const params = new URLSearchParams({
+      jql,
+      fields: 'summary',
+      maxResults: String(limit),
+    });
+    const response = await jiraFetch(`/search/jql?${params.toString()}`);
+    if (!response.ok) {
+      console.error(`session-mcp: Jira search failed (${response.status})`);
+      return [];
+    }
+    const data = await response.json() as any;
+    return (data.issues || []).map((i: any) => i.key);
+  } catch (err) {
+    console.error('session-mcp: Jira search error:', err);
+    return [];
+  }
+}
+
+// ---------- Write operations ----------
+
 /**
  * Link two Jira issues.
  */

src/tools/index.ts

@@ -156,8 +156,8 @@ export const toolDefinitions = [
         until: { type: 'string', description: 'ISO8601 timestamp (default: now)' },
         sources: {
           type: 'array',
-          items: { type: 'string', enum: ['session', 'note', 'commit', 'plan', 'task_commit'] },
-          description: 'Optional filter: which event sources to include (default: all)',
+          items: { type: 'string', enum: ['session', 'note', 'commit', 'plan', 'task_commit', 'jira'] },
+          description: 'Optional filter: which event sources to include (default: all). Jira source pulls issue history (transitions, comments, field changes) via the AgilitonAPI gateway.',
         },
         limit: { type: 'number', description: 'Max events to return (default: 100)' },
       },

src/tools/timeline.ts

@@ -1,10 +1,11 @@
 // CF-2885: Event Timeline — unified chronological view across session-mcp sources
-// Stitches sessions, notes, commits, plans, and task-commit links into a single
-// time-ordered event stream for LLM consumption.
+// Stitches sessions, notes, commits, plans, task-commit links, and Jira history
+// into a single time-ordered event stream for LLM consumption.
 
 import { query } from '../db.js';
+import { getIssueWithHistory, searchIssueKeys } from '../services/jira.js';
 
-export type EventSource = 'session' | 'note' | 'commit' | 'plan' | 'task_commit';
+export type EventSource = 'session' | 'note' | 'commit' | 'plan' | 'task_commit' | 'jira';
 
 export interface TimelineEvent {
   ts: string;                    // ISO8601
@@ -345,6 +346,107 @@ async function fetchPlanEvents(
   return events;
 }
 
+// ---------- Jira source ----------
+
+function filterByTimeWindow<T extends { ts: string }>(events: T[], sinceISO: string, untilISO: string): T[] {
+  const sinceMs = new Date(sinceISO).getTime();
+  const untilMs = new Date(untilISO).getTime();
+  return events.filter(e => {
+    const t = new Date(e.ts).getTime();
+    return t >= sinceMs && t <= untilMs;
+  });
+}
+
+// Resolve relative "since" into ISO8601 for client-side filtering of Jira data
+function resolveSinceISO(since?: string): string {
+  if (!since) return new Date(Date.now() - 7 * 86400_000).toISOString();
+  const rel = since.match(/^-(\d+)([dhm])$/);
+  if (rel) {
+    const n = parseInt(rel[1]);
+    const ms = rel[2] === 'd' ? n * 86400_000 : rel[2] === 'h' ? n * 3600_000 : n * 60_000;
+    return new Date(Date.now() - ms).toISOString();
+  }
+  return since;
+}
+
+function resolveUntilISO(until?: string): string {
+  return until || new Date().toISOString();
+}
+
+async function fetchJiraEvents(
+  subject: string,
+  kind: SubjectKind,
+  sinceISO: string,
+  untilISO: string
+): Promise<TimelineEvent[]> {
+  if (kind !== 'jira') return [];
+
+  const issue = await getIssueWithHistory(subject);
+  if (!issue) return [];
+
+  const events: TimelineEvent[] = [];
+
+  // Creation event
+  if (issue.created) {
+    events.push({
+      ts: issue.created,
+      source: 'jira',
+      type: 'issue_created',
+      subject: issue.key,
+      summary: `${issue.issueType} created: ${issue.summary}`,
+      details: { labels: issue.labels, creator: issue.creator },
+      links: { jira: issue.key },
+    });
+  }
+
+  // Changelog entries (field changes)
+  for (const ch of issue.changelog) {
+    // Prioritize status transitions, assignee changes, resolution changes
+    const notable = new Set(['status', 'assignee', 'resolution', 'priority', 'labels']);
+    if (!notable.has(ch.field)) continue;
+    const fromStr = ch.from ?? '∅';
+    const toStr = ch.to ?? '∅';
+    events.push({
+      ts: ch.ts,
+      source: 'jira',
+      type: `field_change:${ch.field}`,
+      subject: issue.key,
+      summary: `${ch.field}: ${fromStr} → ${toStr} by ${ch.author}`,
+      details: { field: ch.field, from: ch.from, to: ch.to, author: ch.author },
+      links: { jira: issue.key },
+    });
+  }
+
+  // Comments
+  for (const c of issue.comments) {
+    events.push({
+      ts: c.ts,
+      source: 'jira',
+      type: 'comment',
+      subject: issue.key,
+      summary: `💬 ${c.author}: ${truncate(c.body, 120)}`,
+      details: { author: c.author, body: c.body },
+      links: { jira: issue.key },
+    });
+  }
+
+  return filterByTimeWindow(events, sinceISO, untilISO);
+}
+
+async function fetchLinkedSessionIssueKeys(subject: string, kind: SubjectKind): Promise<string[]> {
+  // For a task issue, find session-tracking issues that relate to it
+  if (kind !== 'jira') return [];
+  const jql = `labels = "session-tracking" AND issueFunction in linkedIssuesOf("key = ${subject}")`;
+  // Fallback: simpler query that works without Script Runner
+  const simpleJql = `labels = "session-tracking" AND text ~ "${subject}"`;
+  try {
+    const keys = await searchIssueKeys(simpleJql, 20);
+    return keys;
+  } catch {
+    return [];
+  }
+}
+
 // ---------- main tool ----------
 
 export async function timeline(args: TimelineArgs): Promise<string> {
@@ -360,19 +462,36 @@ export async function timeline(args: TimelineArgs): Promise<string> {
 
   const since = resolveSince(args.since);
   const until = resolveUntil(args.until);
+  const sinceISO = resolveSinceISO(args.since);
+  const untilISO = resolveUntilISO(args.until);
   const limit = args.limit ?? 100;
-  const sourceFilter = new Set<EventSource>(args.sources ?? ['session', 'note', 'commit', 'plan', 'task_commit']);
+  const sourceFilter = new Set<EventSource>(
+    args.sources ?? ['session', 'note', 'commit', 'plan', 'task_commit', 'jira']
+  );
+
+  // For Jira subjects, also fetch any linked session-tracking issues and include their history
+  const jiraTargets: string[] = [];
+  if (kind === 'jira' && sourceFilter.has('jira')) {
+    jiraTargets.push(subject);
+    // Also pull linked session-tracking issues (if this is a task, its session issues)
+    const linked = await fetchLinkedSessionIssueKeys(subject, kind);
+    for (const k of linked) {
+      if (k !== subject) jiraTargets.push(k);
+    }
+  }
 
   // Run all queries in parallel
-  const [sessionEvents, noteEvents, commitEvents, planEvents, taskCommitEvents] = await Promise.all([
+  const [sessionEvents, noteEvents, commitEvents, planEvents, taskCommitEvents, ...jiraEventArrays] = await Promise.all([
     sourceFilter.has('session') ? fetchSessionEvents(subject, kind, since, until) : Promise.resolve([]),
     sourceFilter.has('note') ? fetchNoteEvents(subject, kind, since, until) : Promise.resolve([]),
     sourceFilter.has('commit') ? fetchCommitEvents(subject, kind, since, until) : Promise.resolve([]),
     sourceFilter.has('plan') ? fetchPlanEvents(subject, kind, since, until) : Promise.resolve([]),
     sourceFilter.has('task_commit') ? fetchTaskCommitEvents(subject, kind, since, until) : Promise.resolve([]),
+    ...jiraTargets.map(k => fetchJiraEvents(k, 'jira', sinceISO, untilISO)),
   ]);
 
-  const all = [...sessionEvents, ...noteEvents, ...commitEvents, ...planEvents, ...taskCommitEvents];
+  const jiraEvents = jiraEventArrays.flat();
+  const all = [...sessionEvents, ...noteEvents, ...commitEvents, ...planEvents, ...taskCommitEvents, ...jiraEvents];
 
   // Sort chronologically (oldest → newest by default for narrative reading)
   all.sort((a, b) => new Date(a.ts).getTime() - new Date(b.ts).getTime());
@@ -402,6 +521,7 @@ export async function timeline(args: TimelineArgs): Promise<string> {
       commit: '🔨',
       plan: '📋',
       task_commit: '🔗',
+      jira: '🎫',
     }[e.source];
     output += `  \`${timeStr}\` ${icon} \`${e.type}\` ${e.summary}\n`;
   }