diff --git a/.governance/manifest.json b/.governance/manifest.json
index 76c2b13..297f292 100644
--- a/.governance/manifest.json
+++ b/.governance/manifest.json
@@ -58,7 +58,8 @@
           ".github/workflows/multi-system-tests.yml",
           "VERSION",
           "wellmanifest_governance.py",
-          "setup.py"
+          "setup.py",
+          "errors/**"
         ]
       },
       "infrastructure": {
diff --git a/errors/README.md b/errors/README.md
new file mode 100644
index 0000000..848a6d9
--- /dev/null
+++ b/errors/README.md
@@ -0,0 +1,9 @@
+# Error Runbooks (`fixos`)
+
+Index of error runbooks and diagnostic remediation guides for `semcod/fixos` in accordance with `wellmanifest/logs`.
+
+| Code | Component | Summary | Remediation |
+| --- | --- | --- | --- |
+| `FIXOS-LLM-001` | `fixos.cli.fix_cmd` / `fixos.agent` | LLM provider unavailable or `--no-llm` active during autonomous repair | Automatic fallback to deterministic heuristic diagnostics and safe cleanup (`fixos auto --no-llm`) |
+| `FIXOS-DISK-001` | `fixos.cli._cleanup_space` | Low disk space on `/` or `/tmp` | Run `fixos auto --no-llm --yes` or `fixos cleanup-space --yes` |
+| `FIXOS-SNAP-001` | `fixos.agent.autonomous_session` | Disabled Snap revisions consuming root disk space | Remove disabled Snap revisions via `snap list --all` and `sudo -n snap remove <pkg> --revision=<rev>` |
diff --git a/project/TICKETS.md b/project/TICKETS.md
index 410bb9e..a989752 100644
--- a/project/TICKETS.md
+++ b/project/TICKETS.md
@@ -89,4 +89,6 @@ This file indexes governance tickets without taking ownership of
 | **ticket-083** | [`README.md`](./ticket-083/README.md) | - | - | - | - | - |
 | **ticket-084** | [`README.md`](./ticket-084/README.md) | - | - | - | - | - |
 | **ticket-086** | [`README.md`](./ticket-086/README.md) | - | - | - | - | - |
+| **ticket-088** | [`README.md`](./ticket-088/README.md) | - | - | - | - | - |
+| **ticket-089** | [`README.md`](./ticket-089/README.md) | - | - | - | - | - |
 <!-- AUTO:TICKET_INDEX:END -->
diff --git a/project/ticket-089/README.md b/project/ticket-089/README.md
new file mode 100644
index 0000000..51c0b75
--- /dev/null
+++ b/project/ticket-089/README.md
@@ -0,0 +1,24 @@
+# Ticket 089: Add errors runbook index for Wellmanifest logs compliance
+
+- **ID**: ticket-089
+- **Owner**: agent:antigravity
+- **Status**: IN_PROGRESS
+- **Workflow state**: EDIT
+- **Created**: 2026-10-18
+
+## Goal and scope
+
+Add `errors/README.md` and declare `errors/**` under the `governance` workstream in `.governance/manifest.json` so `wellman check` (`wellmanifest/logs` standard pack) passes with 0 errors.
+
+## Acceptance criteria
+
+- [x] AC-01: `errors/README.md` exists and `wellman check` reports `0 errors`.
+- [x] AC-02: `./project/governance-check.sh` passes (`GOV-PASS`).
+
+## Tracking boundary
+
+This directory contains the minimal reviewed intent. Optional participant prose
+and raw command logs are not required delivery output.
+
+## Execution Authorization
+- SESSION_EXECUTION_AUTHORIZATION: Authorized by user to satisfy Wellmanifest governance and `wellman check` standards.
diff --git a/project/ticket-089/intent.json b/project/ticket-089/intent.json
new file mode 100644
index 0000000..a950014
--- /dev/null
+++ b/project/ticket-089/intent.json
@@ -0,0 +1,84 @@
+{
+  "schema": "new-project.intent/v3",
+  "ticket": "ticket-089",
+  "summary": "Add errors runbook index for Wellmanifest logs compliance",
+  "workstream": "governance",
+  "classification": {
+    "kind": "SERVICE",
+    "priority": "P2",
+    "origin": "health"
+  },
+  "allowedPaths": [
+    "project/ticket-089/**",
+    "TODO.md",
+    "project/TICKETS.md",
+    ".governance/manifest.json",
+    ".governance/standard-adoption.json",
+    "errors/README.md"
+  ],
+  "forbiddenPaths": [
+    "project/ticket-*/user-*.md"
+  ],
+  "stacks": [
+    "python"
+  ],
+  "dependsOn": [],
+  "conflictsWith": [],
+  "integrationTicket": null,
+  "delivery": {
+    "acceptedBaseSha": "d8709725c77e93337e9b69b7dcaf03b946bd4a55",
+    "targetBranch": "main",
+    "outcome": "Add errors/README.md runbook index and register errors/** in .governance/manifest.json so wellman check passes with 0 errors.",
+    "nonGoals": [
+      "No runtime behavior changes."
+    ],
+    "complexity": "XS",
+    "estimatedMinutes": 10,
+    "budgets": {
+      "maxImplementationFiles": 3,
+      "maxAffectedComponents": 1,
+      "maxPublicInterfaceChanges": 0,
+      "maxRuntimeDependencies": 0
+    },
+    "architecture": {
+      "status": "accepted",
+      "decision": "Register errors/** in governance workstream ownedPaths and add errors/README.md index per wellmanifest/logs.",
+      "components": [
+        {
+          "name": "governance",
+          "paths": [
+            ".governance/manifest.json",
+            ".governance/standard-adoption.json",
+            "errors/README.md"
+          ]
+        }
+      ],
+      "responsibilityChanges": false,
+      "interfaceChanges": [],
+      "dataChanges": [],
+      "ui": {
+        "impact": "none",
+        "states": [],
+        "evidence": []
+      },
+      "rollback": "Revert the ticket commit."
+    },
+    "runtimeDependencies": [],
+    "validation": [
+      {
+        "criterion": "AC-01",
+        "commands": [
+          "wellman check ."
+        ],
+        "expected": "0 errors."
+      },
+      {
+        "criterion": "AC-02",
+        "commands": [
+          "./project/governance-check.sh"
+        ],
+        "expected": "GOV-PASS: passed (0 errors, 0 warnings)."
+      }
+    ]
+  }
+}