diff --git a/doc/evals.md b/doc/evals.md
index 499d29278ce..6b9766920d5 100644
--- a/doc/evals.md
+++ b/doc/evals.md
@@ -257,3 +257,7 @@ named existing controls on legacy and native Codex. Discover it with
 results and follow-up coverage are recorded in that suite's guide.
 
 Continuation accounting has an explicit-only eight-cell Product E2E [baseline suite](../tests/runner-e2e/CONTINUATION-ACCOUNTING.md), complementing the deterministic lifecycle inventory.
+
+The explicit-only Product E2E `api-response-reading` suite verifies retrieval of
+large saved API responses on local and Daytona native Codex runs. See the
+[Runner E2E guide](../tests/runner-e2e/README.md#bounded-api-response-reading).
diff --git a/doc/runner-api-tools.md b/doc/runner-api-tools.md
index f095e14783c..2f72b0662be 100644
--- a/doc/runner-api-tools.md
+++ b/doc/runner-api-tools.md
@@ -54,6 +54,22 @@ can be supplied. Routes still validate payloads and enforce permissions.
 Requests have a 30-second HTTP timeout, 16 KiB URL limit and 10 MiB payload/response
 transfer limit. Responses above 24 KiB and binary responses become company-owned
 assets with retrievable references; text previews are limited to 2,000 bytes.
+To inspect saved text without creating another artifact, call its authorized
+content operation with `responseText`:
+
+```json
+{"operationId":"GET /api/assets/{assetId}/content","pathParams":{"assetId":"RETURNED_ARTIFACT_ID"},"responseText":{"offsetBytes":0,"limitBytes":8192}}
+```
+
+The result contains `data` as text (including JSON), plus `responseText` with
+`offsetBytes`, `nextOffsetBytes`, and `totalBytes`. Continue at `nextOffsetBytes`
+until it is null. Windows end at UTF-8 boundaries. The limit defaults to 24 KiB
+and accepts 4–24,576 bytes. The server rejects binary content, invalid UTF-8,
+and offsets inside a code point or beyond the response. This option only works
+with GET; never repeat a mutation to retrieve another part of its response.
+Read the saved artifact for a stable snapshot instead of paging a changing live
+response. The existing 10 MiB transfer limit and all route authorization remain.
+
 Tool responses identify the HTTP route with `apiOperationId`. The native protocol
 reserves `operationId` and `callId` for semantic tool-call identity; API metadata
 must not masquerade as that envelope. Saved mutation receipts are normalized at
diff --git a/packages/paperclip-runner/generated/capability/semantic-tool-contracts.json b/packages/paperclip-runner/generated/capability/semantic-tool-contracts.json
index 1558a1ef65a..83b0294cb43 100644
--- a/packages/paperclip-runner/generated/capability/semantic-tool-contracts.json
+++ b/packages/paperclip-runner/generated/capability/semantic-tool-contracts.json
@@ -1 +1 @@
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company.","inputSchema":{"additionalProperties":false,"properties":{},"required":[],"type":"object"},"name":"list_approvals","outputSchema":{"additionalProperties":true,"type":"object"}},{"annotations":{"exposure":"optional","operationId":"get_approval","requiredClaims":["governance:approvals:read"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Read one approval without protected data.","inputSchema":{"additionalProperties":false,"properties":{"approvalId":{"description":"Approval id.","maxLength":200,"minLength":1,"type":"string"}},"required":["approvalId"],"type":"object"},"name":"get_approval","outputSchema":{"additionalProperties":true,"type":"object"}},{"annotations":{"exposure":"optional","operationId":"get_approval_context","requiredClaims":["governance:approvals:read"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Read one approval, its comments, and linked tasks.","inputSchema":{"additionalProperties":false,"properties":{"approvalId":{"description":"Approval id.","maxLength":200,"minLength":1,"type":"string"}},"required":["approvalId"],"type":"object"},"name":"get_approval_context","outputSchema":{"additionalProperties":true,"type":"object"}},{"annotations":{"exposure":"optional","operationId":"get_workspace_runtime","requiredClaims":["workspace:read"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Read active-task workspace services.","inputSchema":{"additionalProperties":false,"properties":{},"required":[],"type":"object"},"name":"get_workspace_runtime","outputSchema":{"additionalProperties":true,"type":"object"}},{"annotations":{"exposure":"optional","operationId":"control_workspace_service","requiredClaims":["workspace:control"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Start, stop, or fault one active-task workspace service.","inputSchema":{"additionalProperties":false,"properties":{"action":{"enum":["start","stop","fail"]},"idempotencyKey":{"description":"Caller-stable retry key.","maxLength":240,"minLength":1,"type":"string"},"serviceId":{"description":"Workspace service id.","maxLength":200,"minLength":1,"type":"string"},"url":{"description":"Optional service URL.","maxLength":20000,"type":["string","null"]}},"required":["idempotencyKey","serviceId","action"],"type":"object"},"name":"control_workspace_service","outputSchema":{"additionalProperties":false,"properties":{"commandId":{"description":"Stable command identifier.","maxLength":200,"minLength":1,"type":"string"},"disposition":{"enum":["applied","duplicate"]},"entityRefs":{"description":"Entities affected by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"scheduledWakeIds":{"description":"Wake identifiers scheduled by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"stateRevision":{"minimum":0,"type":"integer"}},"required":["commandId","disposition","stateRevision","entityRefs","scheduledWakeIds"],"type":"object"}},{"annotations":{"exposure":"optional","operationId":"set_dependencies","requiredClaims":["dependencies:write"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Replace the active task's first-class blocker set.","inputSchema":{"additionalProperties":false,"properties":{"blockedByTaskIds":{"description":"Replacement blocker task ids.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"idempotencyKey":{"description":"Caller-stable retry key.","maxLength":240,"minLength":1,"type":"string"}},"required":["idempotencyKey","blockedByTaskIds"],"type":"object"},"name":"set_dependencies","outputSchema":{"additionalProperties":false,"properties":{"commandId":{"description":"Stable command identifier.","maxLength":200,"minLength":1,"type":"string"},"disposition":{"enum":["applied","duplicate"]},"entityRefs":{"description":"Entities affected by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"scheduledWakeIds":{"description":"Wake identifiers scheduled by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"stateRevision":{"minimum":0,"type":"integer"}},"required":["commandId","disposition","stateRevision","entityRefs","scheduledWakeIds"],"type":"object"}},{"annotations":{"exposure":"optional","operationId":"create_task","requiredClaims":["delegation:tasks:create"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Create a project task from a conversation, or a child from an ordinary task. Persist initialPlan before execution. Set status to backlog when the user wants to save or plan work without starting it; backlog tasks never wake an agent. Omitted status means todo, subject to blockers.","inputSchema":{"additionalProperties":false,"properties":{"assigneeActorId":{"description":"Optional agent assignee. Omit to assign the current agent.","maxLength":20000,"type":["string","null"]},"blockedByTaskIds":{"description":"Initial blocker task ids.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"description":{"description":"Child task description.","maxLength":20000,"type":["string","null"]},"idempotencyKey":{"description":"Caller-stable retry key.","maxLength":240,"minLength":1,"type":"string"},"initialPlan":{"description":"Relevant markdown plan saved on the new task before execution starts.","maxLength":200000,"type":["string","null"]},"priority":{"enum":["critical","high","medium","low"]},"projectId":{"description":"Project ID for the task.","type":["string","null"]},"status":{"description":"Initial status. Use backlog to save work without executing it. Defaults to todo (blocked when dependencies are unresolved).","enum":["backlog","todo"]},"title":{"description":"Child task title.","maxLength":500,"minLength":1,"type":"string"}},"required":["idempotencyKey","title"],"type":"object"},"name":"create_task","outputSchema":{"additionalProperties":false,"properties":{"commandId":{"description":"Stable command identifier.","maxLength":200,"minLength":1,"type":"string"},"disposition":{"enum":["applied","duplicate"]},"entityRefs":{"description":"Entities affected by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"scheduledWakeIds":{"description":"Wake identifiers scheduled by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"stateRevision":{"minimum":0,"type":"integer"},"task":{"additionalProperties":false,"properties":{"assigneeActorId":{"type":["string","null"]},"id":{"minLength":1,"type":"string"},"identifier":{"type":["string","null"]},"parentId":{"minLength":1,"type":["string","null"]},"projectId":{"minLength":1,"type":["string","null"]},"status":{"minLength":1,"type":"string"}},"required":["id","identifier","parentId","status","assigneeActorId"],"type":"object"}},"required":["commandId","disposition","stateRevision","entityRefs","scheduledWakeIds","task"],"type":"object"}},{"annotations":{"exposure":"optional","operationId":"request_approval","requiredClaims":["governance:approvals:request"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Create a governed approval and waiting posture.","inputSchema":{"additionalProperties":false,"properties":{"approvalType":{"description":"Stable approval type.","maxLength":200,"minLength":1,"type":"string"},"idempotencyKey":{"description":"Caller-stable retry key.","maxLength":240,"minLength":1,"type":"string"},"payload":{"additionalProperties":true,"type":"object"}},"required":["idempotencyKey","approvalType","payload"],"type":"object"},"name":"request_approval","outputSchema":{"additionalProperties":false,"properties":{"commandId":{"description":"Stable command identifier.","maxLength":200,"minLength":1,"type":"string"},"disposition":{"enum":["applied","duplicate"]},"entityRefs":{"description":"Entities affected by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"scheduledWakeIds":{"description":"Wake identifiers scheduled by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"stateRevision":{"minimum":0,"type":"integer"}},"required":["commandId","disposition","stateRevision","entityRefs","scheduledWakeIds"],"type":"object"}},{"annotations":{"exposure":"optional","operationId":"decide_approval","requiredClaims":["governance:approvals:decide"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Decide an approval as an explicitly authorized approver.","inputSchema":{"additionalProperties":false,"properties":{"approvalId":{"description":"Approval id.","maxLength":200,"minLength":1,"type":"string"},"decision":{"enum":["approved","rejected","cancelled"]},"idempotencyKey":{"description":"Caller-stable retry key.","maxLength":240,"minLength":1,"type":"string"},"note":{"description":"Decision note.","maxLength":20000,"minLength":1,"type":"string"}},"required":["idempotencyKey","approvalId","decision","note"],"type":"object"},"name":"decide_approval","outputSchema":{"additionalProperties":false,"properties":{"commandId":{"description":"Stable command identifier.","maxLength":200,"minLength":1,"type":"string"},"disposition":{"enum":["applied","duplicate"]},"entityRefs":{"description":"Entities affected by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"scheduledWakeIds":{"description":"Wake identifiers scheduled by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"stateRevision":{"minimum":0,"type":"integer"}},"required":["commandId","disposition","stateRevision","entityRefs","scheduledWakeIds"],"type":"object"}},{"annotations":{"exposure":"optional","operationId":"comment_on_approval","requiredClaims":["governance:approvals:comment"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Add a durable comment to an approval.","inputSchema":{"additionalProperties":false,"properties":{"approvalId":{"description":"Approval id.","maxLength":200,"minLength":1,"type":"string"},"body":{"description":"Approval comment.","maxLength":20000,"minLength":1,"type":"string"},"idempotencyKey":{"description":"Caller-stable retry key.","maxLength":240,"minLength":1,"type":"string"}},"required":["idempotencyKey","approvalId","body"],"type":"object"},"name":"comment_on_approval","outputSchema":{"additionalProperties":false,"properties":{"commandId":{"description":"Stable command identifier.","maxLength":200,"minLength":1,"type":"string"},"disposition":{"enum":["applied","duplicate"]},"entityRefs":{"description":"Entities affected by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"scheduledWakeIds":{"description":"Wake identifiers scheduled by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"stateRevision":{"minimum":0,"type":"integer"}},"required":["commandId","disposition","stateRevision","entityRefs","scheduledWakeIds"],"type":"object"}},{"annotations":{"exposure":"optional","operationId":"schedule_wake","requiredClaims":["control_plane:wakes"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Schedule a deterministic continuation wake.","inputSchema":{"additionalProperties":false,"properties":{"delayTicks":{"maximum":10000,"minimum":1,"type":"integer"},"idempotencyKey":{"description":"Caller-stable retry key.","maxLength":240,"minLength":1,"type":"string"},"payload":{"additionalProperties":true,"type":"object"},"reason":{"enum":["manual","issue_commented","interaction_resolved","approval_resolved","blockers_resolved","scheduled_retry","resume"]}},"required":["idempotencyKey","reason","delayTicks"],"type":"object"},"name":"schedule_wake","outputSchema":{"additionalProperties":false,"properties":{"commandId":{"description":"Stable command identifier.","maxLength":200,"minLength":1,"type":"string"},"disposition":{"enum":["applied","duplicate"]},"entityRefs":{"description":"Entities affected by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"scheduledWakeIds":{"description":"Wake identifiers scheduled by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"stateRevision":{"minimum":0,"type":"integer"}},"required":["commandId","disposition","stateRevision","entityRefs","scheduledWakeIds"],"type":"object"}},{"annotations":{"exposure":"optional","operationId":"generic_api_request","requiredClaims":["test:generic_api_request"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Test-only escape hatch. Disabled unless the scenario and explicit claim both enable it.","inputSchema":{"additionalProperties":false,"properties":{"body":{"additionalProperties":true,"type":"object"},"method":{"enum":["GET","POST","PATCH"]},"path":{"maxLength":500,"pattern":"^/mock/","type":"string"}},"required":["method","path"],"type":"object"},"name":"generic_api_request","outputSchema":{"additionalProperties":true,"type":"object"}},{"annotations":{"exposure":"optional","operationId":"search_api","requiredClaims":["api:discover"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Fallback only: discover Paperclip API operations when the available dedicated tools cannot express the task. Prefer dedicated tools for common operations; do not search before using them. For a persistent hire, first list_agents to reuse a suitable teammate. Search agent-hires for the hiring schema and agent-configurations for compatible adapter/runtime settings, then use call_api with the returned operationId. Supply role-specific instructionsBundle.files as a filename-to-content record. Use the returned agent.id for delegation and obey any pending approval. Provider helper threads are temporary workers, not Paperclip hires. If a hire response is uncertain, reconcile with list_agents before retrying.","inputSchema":{"additionalProperties":false,"properties":{"cursor":{"maxLength":200,"type":"string"},"limit":{"default":5,"maximum":10,"minimum":1,"type":"integer"},"query":{"maxLength":500,"minLength":1,"type":"string"}},"required":["query"],"type":"object"},"name":"search_api","outputSchema":{"additionalProperties":true,"type":"object"}},{"annotations":{"exposure":"optional","operationId":"call_api","requiredClaims":["api:call"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Fallback only: call a discovered Paperclip API operation when dedicated tools lack the required operation or parameters. Uses your existing permissions. Prefer dedicated tools; never bypass a denial or runner lifecycle tool. For large text responses, read the returned artifact with GET /api/assets/{assetId}/content and responseText; follow nextOffsetBytes until null.","inputSchema":{"additionalProperties":false,"properties":{"body":{"anyOf":[{"additionalProperties":true,"type":"object"},{"items":{},"type":"array"},{"type":"string"},{"type":"number"},{"type":"boolean"},{"type":"null"}],"description":"Request value matching the discovered schema. For JSON object or array requests, pass the object or array directly, never a JSON-encoded string. Strings are for text bodies or endpoints whose schema explicitly accepts a string."},"contentType":{"maxLength":120,"type":"string"},"files":{"items":{"additionalProperties":false,"oneOf":[{"properties":{"artifactId":{}},"required":["artifactId"]},{"properties":{"path":{}},"required":["path"]}],"properties":{"artifactId":{"type":"string"},"field":{"type":"string"},"path":{"description":"File relative to the active issue workspace. Remote files must first be uploaded as an artifact.","type":"string"}},"type":"object"},"maxItems":10,"type":"array"},"operationId":{"description":"Exact operationId returned by search_api, for example GET /api/projects/{id}. Do not guess identifiers.","maxLength":500,"minLength":1,"type":"string"},"pathParams":{"additionalProperties":{"type":"string"},"type":"object"},"query":{"additionalProperties":true,"type":"object"},"responseText":{"additionalProperties":false,"description":"GET only: return a bounded UTF-8 text window inline, including JSON as text, without saving another artifact. Offsets and limits are bytes. Use the returned nextOffsetBytes to continue; null means complete. Prefer reading a saved artifact for a stable snapshot. The 10 MiB transfer limit still applies.","properties":{"limitBytes":{"default":24576,"maximum":24576,"minimum":4,"type":"integer"},"offsetBytes":{"default":0,"maximum":10485760,"minimum":0,"type":"integer"}},"type":"object"}},"required":["operationId"],"type":"object"},"name":"call_api","outputSchema":{"additionalProperties":true,"type":"object"}},{"annotations":{"exposure":"optional","operationId":"create_project","requiredClaims":[],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Create a project after considering existing projects and available repositories. repositoryIds and repositoryUrls accept multiple existing repositories. Use HTTPS GitHub repositoryUrls when an accessible repo is not in the catalog; this registers project repositories, not remote GitHub repositories. Non-code projects may omit repositories. Cannot combine repositoryIds/repositoryUrls with workspace. Reuse the idempotency key on retries.","inputSchema":{"additionalProperties":false,"properties":{"archivedAt":{"description":"Archive timestamp.","maxLength":20000,"type":["string","null"]},"color":{"description":"Project color.","maxLength":20000,"type":["string","null"]},"description":{"description":"Project outcome and context.","maxLength":20000,"type":["string","null"]},"env":{"additionalProperties":true,"type":"object"},"executionWorkspacePolicy":{"additionalProperties":true,"type":"object"},"goalId":{"description":"Goal ID.","maxLength":20000,"type":["string","null"]},"goalIds":{"description":"Goal IDs.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"icon":{"description":"Project icon.","enum":["folder","rocket","code","terminal","database","globe","package","boxes","box","layers","briefcase","compass","target","flame","zap","star","bug","wrench","hammer","lightbulb","sparkles","shield","lock","search","cog","brain","cpu","git-branch","file-code","puzzle","gem","atom","heart","mail","message-square","crown","radar","telescope","hexagon",null],"type":["string","null"]},"idempotencyKey":{"description":"Caller-stable retry key.","maxLength":240,"minLength":1,"type":"string"},"leadAgentId":{"description":"Lead agent ID.","maxLength":20000,"type":["string","null"]},"name":{"description":"Project name.","maxLength":500,"minLength":1,"type":"string"},"repositoryIds":{"description":"Authorized repository IDs from list_project_repositories; may contain multiple repositories.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"repositoryUrls":{"description":"Existing HTTPS GitHub repository URLs, including repos absent from the catalog.","items":{"maxLength":2000,"pattern":"^https://github\\.com/(?!\\.{1,2}/)[A-Za-z0-9_.-]+/(?!\\.{1,2}/?$)[A-Za-z0-9_.-]+/?$","type":"string"},"maxItems":100,"type":"array"},"status":{"enum":["backlog","planned","in_progress","completed","cancelled"]},"targetDate":{"description":"Target date.","maxLength":20000,"type":["string","null"]},"workspace":{"additionalProperties":true,"type":"object"}},"required":["idempotencyKey","name"],"type":"object"},"name":"create_project","outputSchema":{"additionalProperties":true,"type":"object"}},{"annotations":{"exposure":"optional","operationId":"list_project_repositories","requiredClaims":[],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"List authorized repositories with stable IDs and names. Consider appropriate repositories before creating a project; never invent IDs.","inputSchema":{"additionalProperties":false,"properties":{},"required":[],"type":"object"},"name":"list_project_repositories","outputSchema":{"additionalProperties":true,"type":"object"}},{"annotations":{"exposure":"optional","operationId":"list_projects","requiredClaims":["discovery:projects:read"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Inspect available company projects before selecting a project for new work.","inputSchema":{"additionalProperties":false,"properties":{},"required":[],"type":"object"},"name":"list_projects","outputSchema":{"additionalProperties":true,"type":"object"}},{"annotations":{"exposure":"optional","operationId":"create_skill","requiredClaims":[],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Create a reusable single-file skill in the company library. Supply a complete SKILL.md whose name and description match the inputs. This saves the skill and shows a card; it does not assign the skill to any agent. Reuse idempotencyKey on retries.","inputSchema":{"additionalProperties":false,"properties":{"description":{"maxLength":2000,"minLength":1,"type":"string"},"idempotencyKey":{"maxLength":240,"minLength":1,"type":"string"},"markdown":{"description":"Complete SKILL.md including name and description frontmatter and substantive instructions.","maxLength":200000,"minLength":1,"type":"string"},"name":{"description":"Lowercase skill name, matching SKILL.md frontmatter.","maxLength":120,"minLength":1,"pattern":"^[a-z0-9]+(?:-[a-z0-9]+)*$","type":"string"},"slug":{"description":"Optional; must equal name.","maxLength":120,"minLength":1,"pattern":"^[a-z0-9]+(?:-[a-z0-9]+)*$","type":"string"}},"required":["idempotencyKey","name","description","markdown"],"type":"object"},"name":"create_skill","outputSchema":{"additionalProperties":true,"type":"object"}},{"annotations":{"exposure":"optional","operationId":"reassign_task","requiredClaims":["delegation:tasks:assign"],"semanticContract":"paperclip.semantic-tool.v1","version":1},"description":"Reassign an existing task to another company agent. Read search_tasks first and supply its current assignee and statusVersion to prevent overwriting a concurrent change. Preserve the task, documents, dependencies, and blocked/backlog status. Active work is stopped before handoff. Use a stable idempotency key for retries. Cannot reassign this run’s own task, conversations, completed tasks, or pending reviews; use create_task for delegation from the current task.","inputSchema":{"additionalProperties":false,"properties":{"assigneeActorId":{"description":"New company agent ID from list_agents.","minLength":1,"type":"string"},"expectedAssigneeActorId":{"description":"Current assigneeAgentId from search_tasks; null means unassigned.","type":["string","null"]},"expectedStatusVersion":{"description":"Current statusVersion from search_tasks.","minimum":0,"type":"integer"},"idempotencyKey":{"description":"Caller-stable retry key.","maxLength":240,"minLength":1,"type":"string"},"reason":{"description":"Why the task should move and context for the new owner.","maxLength":20000,"minLength":1,"type":"string"},"taskId":{"description":"Existing task ID from search_tasks.","minLength":1,"type":"string"}},"required":["idempotencyKey","taskId","assigneeActorId","expectedAssigneeActorId","expectedStatusVersion","reason"],"type":"object"},"name":"reassign_task","outputSchema":{"additionalProperties":false,"properties":{"commandId":{"description":"Stable command identifier.","maxLength":200,"minLength":1,"type":"string"},"disposition":{"enum":["applied","duplicate"]},"entityRefs":{"description":"Entities affected by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"scheduledWakeIds":{"description":"Wake identifiers scheduled by the operation.","items":{"minLength":1,"type":"string"},"maxItems":200,"type":"array","uniqueItems":true},"stateRevision":{"minimum":0,"type":"integer"}},"required":["commandId","disposition","stateRevision","entityRefs","scheduledWakeIds"],"type":"object"}}]
diff --git a/packages/paperclip-runner/generated/semantic-action-catalog.json b/packages/paperclip-runner/generated/semantic-action-catalog.json
index 2df6b716fb4..020e3b3e9ed 100644
--- a/packages/paperclip-runner/generated/semantic-action-catalog.json
+++ b/packages/paperclip-runner/generated/semantic-action-catalog.json
@@ -112,7 +112,7 @@
       "planning",
       "skill_test"
     ],
-    "description": "Fallback only: call a discovered Paperclip API operation when dedicated tools lack the required operation or parameters. Uses your existing permissions. Prefer dedicated tools; never bypass a denial or runner lifecycle tool.",
+    "description": "Fallback only: call a discovered Paperclip API operation when dedicated tools lack the required operation or parameters. Uses your existing permissions. Prefer dedicated tools; never bypass a denial or runner lifecycle tool. For large text responses, read the returned artifact with GET /api/assets/{assetId}/content and responseText; follow nextOffsetBytes until null.",
     "effect": "write",
     "inputSchema": {
       "additionalProperties": false,
@@ -199,6 +199,25 @@
         "query": {
           "additionalProperties": true,
           "type": "object"
+        },
+        "responseText": {
+          "additionalProperties": false,
+          "description": "GET only: return a bounded UTF-8 text window inline, including JSON as text, without saving another artifact. Offsets and limits are bytes. Use the returned nextOffsetBytes to continue; null means complete. Prefer reading a saved artifact for a stable snapshot. The 10 MiB transfer limit still applies.",
+          "properties": {
+            "limitBytes": {
+              "default": 24576,
+              "maximum": 24576,
+              "minimum": 4,
+              "type": "integer"
+            },
+            "offsetBytes": {
+              "default": 0,
+              "maximum": 10485760,
+              "minimum": 0,
+              "type": "integer"
+            }
+          },
+          "type": "object"
         }
       },
       "required": [
diff --git a/packages/paperclip-runner/protocol/fixtures/evals/native-execution-seeded.json b/packages/paperclip-runner/protocol/fixtures/evals/native-execution-seeded.json
index 4ff19e56d72..527db909f33 100644
--- a/packages/paperclip-runner/protocol/fixtures/evals/native-execution-seeded.json
+++ b/packages/paperclip-runner/protocol/fixtures/evals/native-execution-seeded.json
@@ -24,7 +24,7 @@
     "prpVersion": 1,
     "nativeExecutionVersion": 1,
     "catalogVersion": 1,
-    "catalogSha256": "sha256:1fa8ecf5d3c28e62a32e818de95633ff3efe5d4af1a100310516ff9b5ab2358d",
+    "catalogSha256": "sha256:c5e8a60c932b37ae017b1e27d2dbc92e1ffcca628b9797a87613cb4b5bb411b5",
     "driverContractVersion": 1,
     "driverKind": "paperclip-deterministic",
     "driverVersion": "1.0.0"
diff --git a/packages/paperclip-runner/protocol/manifest.json b/packages/paperclip-runner/protocol/manifest.json
index 83ac18ab79d..4f507e26601 100644
--- a/packages/paperclip-runner/protocol/manifest.json
+++ b/packages/paperclip-runner/protocol/manifest.json
@@ -160,7 +160,7 @@
     },
     {
       "path": "fixtures/evals/native-execution-seeded.json",
-      "sha256": "5f3144ea856ad27778f47de73eb542703b1d9df2abad2c427838fbaf69c3d59f",
+      "sha256": "2301e907b4a76d4e9f875259133a8aa20516368bb8b8380c831d20cd1aa10df3",
       "expectation": "accept",
       "compatibilityCase": "canonical"
     },
diff --git a/packages/paperclip-runner/src/protocol-actions/call-api.ts b/packages/paperclip-runner/src/protocol-actions/call-api.ts
index ffbed93c8c9..02d23dde204 100644
--- a/packages/paperclip-runner/src/protocol-actions/call-api.ts
+++ b/packages/paperclip-runner/src/protocol-actions/call-api.ts
@@ -28,7 +28,7 @@ export const callApiAction = {
   },
   "documentation": {
     "title": "Call the Paperclip API",
-    "description": "Fallback only: call a discovered Paperclip API operation when dedicated tools lack the required operation or parameters. Uses your existing permissions. Prefer dedicated tools; never bypass a denial or runner lifecycle tool.",
+    "description": "Fallback only: call a discovered Paperclip API operation when dedicated tools lack the required operation or parameters. Uses your existing permissions. Prefer dedicated tools; never bypass a denial or runner lifecycle tool. For large text responses, read the returned artifact with GET /api/assets/{assetId}/content and responseText; follow nextOffsetBytes until null.",
     "note": "Production HTTP fallback; does not grant privileges or replace dedicated tools."
   },
   "examples": {
@@ -51,7 +51,7 @@ export const callApiAction = {
       "operationId": "call_api",
       "version": 1,
       "title": "Call the Paperclip API",
-      "description": "Fallback only: call a discovered Paperclip API operation when dedicated tools lack the required operation or parameters. Uses your existing permissions. Prefer dedicated tools; never bypass a denial or runner lifecycle tool.",
+      "description": "Fallback only: call a discovered Paperclip API operation when dedicated tools lack the required operation or parameters. Uses your existing permissions. Prefer dedicated tools; never bypass a denial or runner lifecycle tool. For large text responses, read the returned artifact with GET /api/assets/{assetId}/content and responseText; follow nextOffsetBytes until null.",
       "exposure": "optional",
       "requiredClaims": [
         "api:call"
@@ -96,6 +96,15 @@ export const callApiAction = {
             "type": "string",
             "maxLength": 120
           },
+          "responseText": {
+            "description": "GET only: return a bounded UTF-8 text window inline, including JSON as text, without saving another artifact. Offsets and limits are bytes. Use the returned nextOffsetBytes to continue; null means complete. Prefer reading a saved artifact for a stable snapshot. The 10 MiB transfer limit still applies.",
+            "type": "object",
+            "properties": {
+              "offsetBytes": { "type": "integer", "minimum": 0, "maximum": 10485760, "default": 0 },
+              "limitBytes": { "type": "integer", "minimum": 4, "maximum": 24576, "default": 24576 }
+            },
+            "additionalProperties": false
+          },
           "files": {
             "type": "array",
             "maxItems": 10,
diff --git a/server/src/services/native-runtime/runner-api-client.ts b/server/src/services/native-runtime/runner-api-client.ts
index dec7582012f..7fb6123e199 100644
--- a/server/src/services/native-runtime/runner-api-client.ts
+++ b/server/src/services/native-runtime/runner-api-client.ts
@@ -18,6 +18,10 @@ export const runnerApiCallSchema = z.object({
   body: z.unknown().optional(),
   contentType: z.string().max(120).optional(),
   files: z.array(fileSchema).max(10).optional(),
+  responseText: z.object({
+    offsetBytes: z.number().int().min(0).max(RUNNER_API_MAX_BYTES).optional(),
+    limitBytes: z.number().int().min(4).max(RUNNER_API_INLINE_BYTES).optional(),
+  }).strict().optional(),
 }).strict();
 export type RunnerApiCall = z.infer<typeof runnerApiCallSchema>;
 export type RunnerApiFile = z.infer<typeof fileSchema>;
@@ -44,6 +48,7 @@ export function validateRunnerApiCall(value: unknown, context: RunnerApiContext)
   const input = parsed.data;
   const operation = runnerApiOperation(input.operationId);
   if (operation.transport !== "rest") throw unprocessable("This endpoint requires its existing protocol client; call_api supports REST only");
+  if (input.responseText && operation.method !== "GET") throw badRequest("responseText requires a GET operation; read the saved artifact instead of repeating a mutation");
   const restriction = runnerApiRestriction(operation.method, operation.path);
   if (restriction) throw forbidden(restriction);
   if (!operation.allowedModes.includes(context.workMode)) throw forbidden("call_api permits only reads in Ask and Plan modes; use the permitted dedicated tools");
@@ -139,7 +144,8 @@ export async function readBoundedResponse(response: Response, maxBytes = RUNNER_
 }
 
 export async function executeRunnerApi(input: RunnerApiCall, context: RunnerApiContext, io: RunnerApiIo) {
-  const { operation } = validateRunnerApiCall(input, context);
+  const { operation, input: validated } = validateRunnerApiCall(input, context);
+  input = validated;
   const url = runnerApiUrl(operation, input, context, io.apiUrl);
   if (!io.token) throw new Error("Paperclip run authentication is unavailable");
   const headers = new Headers({ Authorization: `Bearer ${io.token}`, "X-Paperclip-Run-Id": context.runId });
@@ -192,9 +198,27 @@ export async function executeRunnerApi(input: RunnerApiCall, context: RunnerApiC
   const uncertainty = { outcome: "unknown", guidance: "Inspect current state before retrying this mutation; it may already have succeeded." };
   const base = { ok: response.ok, status: response.status, operationId: operation.operationId, contentType: type, retryAfter: response.headers.get("retry-after"), ...(uncertain ? uncertainty : {}) };
   if (response.status >= 300 && response.status < 400) return { ...base, ok: false, error: "api_redirect_not_followed" };
+  if (input.responseText) {
+    if (!/json|^text\//i.test(type)) return { ...base, ok: false, error: "response_text_requires_text_content" };
+    const offsetBytes = input.responseText.offsetBytes ?? 0;
+    if (offsetBytes > bytes.length || (offsetBytes < bytes.length && (bytes[offsetBytes] & 0xc0) === 0x80)) {
+      return { ...base, ok: false, error: "response_text_invalid_offset", byteSize: bytes.length };
+    }
+    let end = Math.min(bytes.length, offsetBytes + (input.responseText.limitBytes ?? RUNNER_API_INLINE_BYTES));
+    // Do not cut a UTF-8 code point. The next offset always starts a whole one.
+    while (end < bytes.length && end > offsetBytes && (bytes[end] & 0xc0) === 0x80) end--;
+    if (end === offsetBytes && end < bytes.length) return { ...base, ok: false, error: "response_text_invalid_utf8" };
+    try {
+      const data = new TextDecoder("utf-8", { fatal: true, ignoreBOM: true }).decode(bytes.subarray(offsetBytes, end));
+      return { ...base, data, responseText: { offsetBytes, nextOffsetBytes: end < bytes.length ? end : null, totalBytes: bytes.length } };
+    } catch {
+      return { ...base, ok: false, error: "response_text_invalid_utf8" };
+    }
+  }
   if (!bytes.length) return { ...base, data: null };
   if (bytes.length > RUNNER_API_INLINE_BYTES || !/json|^text\//i.test(type)) {
-    return { ...base, artifact: await io.saveResponse(bytes, type), byteSize: bytes.length, preview: /json|^text\//i.test(type) ? bytes.subarray(0, 2000).toString("utf8") : null };
+    return { ...base, artifact: await io.saveResponse(bytes, type), byteSize: bytes.length, preview: /json|^text\//i.test(type) ? bytes.subarray(0, 2000).toString("utf8") : null,
+      ...(/json|^text\//i.test(type) ? { guidance: "Read the saved artifact with GET /api/assets/{assetId}/content and responseText: { offsetBytes: 0 }. Continue with responseText.nextOffsetBytes until null. Do not repeat a mutation to read its response." } : {}) };
   }
   const text = bytes.toString("utf8");
   if (/json/i.test(type)) {
diff --git a/server/src/services/native-runtime/runner-api.integration.test.ts b/server/src/services/native-runtime/runner-api.integration.test.ts
index 805a618c6b3..f04b2654c6e 100644
--- a/server/src/services/native-runtime/runner-api.integration.test.ts
+++ b/server/src/services/native-runtime/runner-api.integration.test.ts
@@ -3,7 +3,7 @@ import { randomUUID } from "node:crypto";
 import { chmod, writeFile, symlink } from "node:fs/promises";
 import { join } from "node:path";
 import { eq } from "drizzle-orm";
-import { documents, heartbeatRuns, issues, routineDocuments, routines } from "@paperclipai/db";
+import { assets, documents, heartbeatRuns, issues, routineDocuments, routines } from "@paperclipai/db";
 import { beforeAll, afterAll, beforeEach, afterEach, describe, expect, it, vi } from "vitest";
 import { startRunnerApiTestServer } from "../../__tests__/helpers/runner-api-server.js";
 import { createRunnerdCodexTransport, defaultCapabilityRunnerdBinary } from "../../vendor/paperclip-runner/index.js";
@@ -248,6 +248,29 @@ else if(m.id!==undefined) send({id:m.id,result:{}});
     } finally { getObject.mockRestore(); }
   });
 
+  it("retrieves every byte of a saved large response without creating an artifact loop", async () => {
+    const fixture = await server.fixture();
+    const foreign = await server.fixture();
+    const text = JSON.stringify({ padding: "🧭é".repeat(6000), evidence: "last-field-is-readable" });
+    const stored = await server.storage.putFile({ companyId: fixture.companyId, namespace: "eval", originalFilename: "evidence.json", contentType: "application/json", body: Buffer.from(text) });
+    const [asset] = await server.db.insert(assets).values({ ...stored, companyId: fixture.companyId, createdByAgentId: fixture.agentId }).returning();
+    const call = (authority: typeof fixture.authority, assetId: string, responseText?: object) => authority.execute({ tool: "call_api", callId: randomUUID(), arguments: { operationId: "GET /api/assets/{assetId}/content", pathParams: { assetId }, ...(responseText ? { responseText } : {}) } }) as Promise<any>;
+    const initial = await call(fixture.authority, asset.id);
+    expect(initial).toMatchObject({ status: 200, artifact: { byteSize: Buffer.byteLength(text) } });
+    const before = (await fixture.snapshot()).assets.length;
+    let offsetBytes = 0;
+    let result = "";
+    do {
+      const page = await call(fixture.authority, initial.artifact.artifactId, { offsetBytes, limitBytes: 4096 });
+      expect(page).toMatchObject({ status: 200, responseText: { offsetBytes, totalBytes: Buffer.byteLength(text) } });
+      result += page.data;
+      offsetBytes = page.responseText.nextOffsetBytes;
+    } while (offsetBytes !== null);
+    expect(JSON.parse(result)).toEqual(JSON.parse(text));
+    expect((await fixture.snapshot()).assets).toHaveLength(before);
+    expect(await call(foreign.authority, initial.artifact.artifactId, { offsetBytes: 0 })).toMatchObject({ ok: false, status: 404 });
+  });
+
   it("contains workspace files, checks artifact ownership, and persists downloads", async () => {
     const fixture = await server.fixture();
     const foreign = await server.fixture();
diff --git a/server/src/services/native-runtime/runner-api.test.ts b/server/src/services/native-runtime/runner-api.test.ts
index 047bf1a9248..3c164d60946 100644
--- a/server/src/services/native-runtime/runner-api.test.ts
+++ b/server/src/services/native-runtime/runner-api.test.ts
@@ -591,6 +591,51 @@ describe("runner API request boundary", () => {
       ).toThrow("inline JSON object");
     }
   });
+  it("reads complete large text without recursively saving response artifacts", async () => {
+    const text = "prefix\n" + "🧭é\n".repeat(6000) + "END-OF-EVIDENCE";
+    const saveResponse = vi.fn(io(fetch).saveResponse);
+    const request = vi.fn<typeof fetch>(async () => new Response(text, { headers: { "content-type": "application/json" } }));
+    let offsetBytes = 0;
+    let received = "";
+    do {
+      const result = await executeRunnerApi({ operationId: projects, responseText: { offsetBytes, limitBytes: 4096 } }, context, { ...io(request), saveResponse }) as any;
+      expect(result).toMatchObject({ ok: true, responseText: { offsetBytes, totalBytes: Buffer.byteLength(text) } });
+      expect(Buffer.byteLength(result.data)).toBeLessThanOrEqual(4096);
+      received += result.data;
+      offsetBytes = result.responseText.nextOffsetBytes;
+    } while (offsetBytes !== null);
+    expect(received).toBe(text);
+    expect(saveResponse).not.toHaveBeenCalled();
+    expect(request.mock.calls.every(([, options]) => new Headers(options?.headers).get("Authorization") === "Bearer private-agent-token")).toBe(true);
+  });
+  it.each([{ offsetBytes: -1 }, { limitBytes: 0 }, { limitBytes: 3 }, { limitBytes: 24577 }, { offsetBytes: 0.5 }])("rejects invalid text windows before dispatch: %j", async responseText => {
+    const request = vi.fn<typeof fetch>();
+    await expect(executeRunnerApi({ operationId: projects, responseText }, context, io(request))).rejects.toThrow("Invalid call_api arguments");
+    expect(request).not.toHaveBeenCalled();
+  });
+  it("does not page mutation responses by repeating the mutation", async () => {
+    const request = vi.fn<typeof fetch>();
+    await expect(executeRunnerApi({ operationId: createProject, body: { name: "Once" }, responseText: {} }, context, io(request))).rejects.toThrow("GET");
+    expect(request).not.toHaveBeenCalled();
+  });
+  it("rejects binary, invalid UTF-8 and offsets that split text", async () => {
+    for (const [body, type, offsetBytes] of [
+      [Buffer.from("binary"), "application/octet-stream", 0],
+      [Buffer.from([0xff]), "text/plain", 0],
+      [Buffer.concat([Buffer.from([0xc2]), Buffer.alloc(24576, 0x80)]), "text/plain", 0],
+      [Buffer.from("é"), "text/plain", 1],
+      [Buffer.from("short"), "text/plain", 6],
+    ] as const) {
+      const saveResponse = vi.fn(io(fetch).saveResponse);
+      const result = await executeRunnerApi({ operationId: projects, responseText: { offsetBytes } }, context, { ...io(async () => new Response(body, { headers: { "content-type": type } })), saveResponse });
+      expect(result).toMatchObject({ ok: false, error: expect.stringContaining("response_text") });
+      expect(saveResponse).not.toHaveBeenCalled();
+    }
+  });
+  it("preserves denials and the transfer limit for bounded text reads", async () => {
+    expect(await executeRunnerApi({ operationId: projects, responseText: {} }, context, io(async () => Response.json({ error: "denied" }, { status: 403 })))).toMatchObject({ ok: false, status: 403, data: '{"error":"denied"}' });
+    expect(await executeRunnerApi({ operationId: projects, responseText: {} }, context, io(async () => new Response("small", { headers: { "content-type": "text/plain", "content-length": String(10 * 1024 * 1024 + 1) } })))).toMatchObject({ ok: false, status: null, outcome: "read_failed" });
+  });
   it("bounds streamed responses even without content-length", async () => {
     await expect(
       readBoundedResponse(new Response("too large"), 3),
diff --git a/tests/runner-e2e/README.md b/tests/runner-e2e/README.md
index 893e4b3a8a5..4ee26a4e118 100644
--- a/tests/runner-e2e/README.md
+++ b/tests/runner-e2e/README.md
@@ -1042,3 +1042,15 @@ keys with low request limits. It can only lower the configured campaign limit.
 Keep subscription qualification separate from API-key results.
 
 The explicit-only eight-cell [continuation accounting baseline](CONTINUATION-ACCOUNTING.md) tests productive work, bounded repair, restart and late gates with real providers.
+
+### Bounded API response reading
+
+`api-response-reading` is an explicit-only, two-cell native Codex suite (local
+and Daytona). Each cell creates synthetic diagnostic evidence over 24 KiB via
+the public API, outside the agent assignment. The browser starts one ordinary
+task which must read the saved response in bounded text pages and persist the
+exact hidden evidence code. The oracle also requires completed API tool events;
+missing events or a narrative completion cannot pass. Existing run, copyback,
+screenshot, billing and environment cleanup checks apply. Use
+`--id api-response-reading.runner-codex.daytona.saved-text-pages` with an
+immutable Daytona image; no private hooks or fixture database writes are used.
diff --git a/tests/runner-e2e/api-response-reading.test.ts b/tests/runner-e2e/api-response-reading.test.ts
new file mode 100644
index 00000000000..95a93cdbefc
--- /dev/null
+++ b/tests/runner-e2e/api-response-reading.test.ts
@@ -0,0 +1,19 @@
+import { describe, expect, it } from "vitest";
+import { apiResponseReadingTask, responseEvidenceCode, responseEvidenceDescription, successfulApiReadCount } from "./api-response-reading.js";
+
+describe("large API response evidence fixture", () => {
+  it("keeps evidence beyond both preview and inline limits and out of the assignment", () => {
+    const source = responseEvidenceDescription("fixture");
+    const code = responseEvidenceCode("fixture");
+    expect(Buffer.byteLength(source)).toBeGreaterThan(24 * 1024);
+    expect(source.indexOf(code)).toBeGreaterThan(24 * 1024);
+    expect(apiResponseReadingTask.buildPrompt("fixture")).not.toContain(code);
+    expect(apiResponseReadingTask.buildPrompt("fixture")).toContain("responseText.nextOffsetBytes");
+  });
+  it("counts only real completed API tool events, never narrative claims or missing evidence", () => {
+    const event = { eventType: "tool.execution.completed", payload: { prpEvent: { payload: { name: "call_api", status: "completed" } } } };
+    expect(successfulApiReadCount([event])).toBe(1);
+    expect(successfulApiReadCount([])).toBe(0);
+    expect(successfulApiReadCount([{ ...event, eventType: "item.delta" }, { ...event, payload: null }, { ...event, payload: { prpEvent: { payload: { name: "call_api", status: "failed" } } } }])).toBe(0);
+  });
+});
diff --git a/tests/runner-e2e/api-response-reading.ts b/tests/runner-e2e/api-response-reading.ts
new file mode 100644
index 00000000000..f737a4d32b5
--- /dev/null
+++ b/tests/runner-e2e/api-response-reading.ts
@@ -0,0 +1,43 @@
+import { createHash } from "node:crypto";
+import type { RunnerTaskFixture } from "./types.js";
+
+export function responseEvidenceCode(nonce: string) {
+  return createHash("sha256").update(`bounded-response-evidence:${nonce}`).digest("hex");
+}
+export function responseEvidenceDescription(nonce: string) {
+  return `${"Synthetic diagnostic padding.\n".repeat(1400)}\nEvidence code: ${responseEvidenceCode(nonce)}\n`;
+}
+
+export function successfulApiReadCount(events: readonly { eventType?: string; payload?: unknown }[]) {
+  return events.filter(event => {
+    const outer = event.payload as { prpEvent?: { payload?: { name?: string; status?: string } } } | null;
+    const payload = outer?.prpEvent?.payload;
+    return event.eventType === "tool.execution.completed" && payload?.name === "call_api" && payload.status === "completed";
+  }).length;
+}
+
+export const apiResponseReadingTask: RunnerTaskFixture = {
+  id: "saved-text-pages", label: "Read saved large API evidence", groups: [],
+  workMode: "standard", flow: "single_turn", expectedRunCount: 1,
+  attemptTimeoutMs: { local: 10 * 60_000, daytona: 10 * 60_000 },
+  expectedTerminalState: { issue: "done", run: "succeeded" },
+  buildTitle: nonce => `Read large API evidence ${nonce}`,
+  buildVisibleMarker: nonce => `API_RESPONSE_READ_${nonce}`,
+  buildPrompt: nonce => [
+    "Inspect diagnostic evidence task {{API_RESPONSE_SOURCE_ID}} using the Paperclip API tools.",
+    "Discover GET /api/issues/{id}, call it for that task, and retain the returned response artifact.",
+    "Read the saved artifact through GET /api/assets/{assetId}/content with responseText: {offsetBytes:0,limitBytes:8192}.",
+    "Continue using responseText.nextOffsetBytes until null. Extract the Evidence code at the end of its description.",
+    "The large response must be read with bounded responseText pages. Do not use other tools or API routes to obtain the evidence; if bounded reading fails, report the failure instead of substituting a different reader.",
+    "Write only that code followed by a newline to api-response-proof.txt in the current workspace. Do not edit the evidence task or create child tasks.",
+    `Verify the proof file and finish this task with paperclip_finish, reportedWorkDisposition done, and summary API_RESPONSE_READ_${nonce}.`,
+  ].join("\n"),
+  buildMatchers: (nonce, execution) => [
+    { kind: "file_exact", path: "api-response-proof.txt", expected: `${responseEvidenceCode(nonce)}\n` },
+    { kind: "message_contains", expected: `API_RESPONSE_READ_${nonce}` },
+    { kind: "issue_status", expected: "done" },
+    { kind: "run_status", expected: "succeeded" },
+    { kind: "runtime_mode", expected: execution.profile.expectedRuntimeMode },
+    { kind: "environment", expected: execution.environment.id },
+  ],
+};
diff --git a/tests/runner-e2e/catalog.test.ts b/tests/runner-e2e/catalog.test.ts
index 6d3504082e8..a0f9fffe46e 100644
--- a/tests/runner-e2e/catalog.test.ts
+++ b/tests/runner-e2e/catalog.test.ts
@@ -71,10 +71,10 @@ describe("runner E2E catalog", () => {
     expect(localIntegrityTasks).toHaveLength(2);
     expect(openRouterBreadthTasks).toHaveLength(3);
     expect(runnerSuites.map((suite) => suite.expectedMatrixSize)).toEqual([
-      8, 46, 23, 47, 52, 28, 18, 6, 6, 42, 14, 10, 2,
+      2, 8, 46, 23, 47, 52, 28, 18, 6, 6, 42, 14, 10, 2,
     ]);
-    expect(validateRunnerCatalog()).toHaveLength(302);
-    expect(new Set(runnerMatrix.map((entry) => entry.id)).size).toBe(302);
+    expect(validateRunnerCatalog()).toHaveLength(304);
+    expect(new Set(runnerMatrix.map((entry) => entry.id)).size).toBe(304);
     expect(
       runnerMatrix.filter((entry) => entry.suite.id === "core-compatibility"),
     ).toHaveLength(42);
diff --git a/tests/runner-e2e/catalog.ts b/tests/runner-e2e/catalog.ts
index f22fd9b8bf2..fe2844503c5 100644
--- a/tests/runner-e2e/catalog.ts
+++ b/tests/runner-e2e/catalog.ts
@@ -1,3 +1,4 @@
+import { apiResponseReadingTask } from "./api-response-reading.js";
 import { accountingTasks } from "./accounting-cases.js";
 import { continuationTasks } from "./continuation-cases.js";
 import { lifecycleLiveTasks, lifecycleLiveDefinitionDigest } from "./lifecycle-live-cases.js";
@@ -911,6 +912,14 @@ const everydayProfiles = [
 ].map(productionStoryProfile);
 
 export const runnerSuites: readonly RunnerSuiteFixture[] = [
+  {
+    id: "api-response-reading", label: "Bounded API response reading", manualOnly: true,
+    description: "Retrieve evidence beyond a saved API preview through authorized bounded text windows.",
+    groups: [], environments: runnerEnvironments,
+    profiles: runnerProfiles.filter(profile => profile.id === "runner-codex"),
+    tasks: [apiResponseReadingTask], expectedMatrixSize: 2,
+    definitionMetadata: { version: 1, grading: "hidden-evidence-exact-copy-and-api-tool-events", scheduling: "explicit-only" },
+  },
   {
     id: "continuation-accounting", label: "Continuation accounting baseline", manualOnly: true,
     description: "Structured productive steps, bounded repair, restart and late gates; comments cannot buy more attempts.",
diff --git a/tests/runner-e2e/runner.spec.ts b/tests/runner-e2e/runner.spec.ts
index 19923ae6f3a..ec5e05116f7 100644
--- a/tests/runner-e2e/runner.spec.ts
+++ b/tests/runner-e2e/runner.spec.ts
@@ -1,3 +1,4 @@
+import { responseEvidenceDescription, successfulApiReadCount } from "./api-response-reading.js";
 import { observeBrowserBootstrap } from "./browser-bootstrap-diagnostics.js";
 import { runAccountingFlow } from "./accounting-flow.js";
 import type { Issue } from "../../packages/shared/src/types/issue.js";
@@ -794,6 +795,14 @@ for (const execution of executions) {
         daytonaImage: process.env.PAPERCLIP_E2E_DAYTONA_IMAGE,
       });
 
+      if (execution.suite.id === "api-response-reading") {
+        const source = await api.post<{ id: string }>(`/api/companies/${fixtures.company.id}/issues`, {
+          title: `Synthetic diagnostic evidence ${nonce}`,
+          description: responseEvidenceDescription(nonce), status: "backlog",
+        });
+        prompt = prompt.replaceAll("{{API_RESPONSE_SOURCE_ID}}", source.id);
+      }
+
       if (execution.suite.id === "lifecycle-baseline" && lifecycleLiveCase(execution.task.id)?.family === "blocker") {
         const prerequisite = await api.post<{ id: string }>(`/api/companies/${fixtures.company.id}/issues`, {
           title: `Supply dataset ${nonce}`,
@@ -1885,6 +1894,11 @@ for (const execution of executions) {
         }
       }
 
+      if (execution.suite.id === "api-response-reading") {
+        const completedReads = successfulApiReadCount(runEventsByRun.flatMap(captured => captured.events));
+        if (completedReads < 3) invariantFailures.push(`Expected source read and multiple bounded artifact reads; observed ${completedReads} completed API calls`);
+      }
+
       const context = record(run.contextSnapshot);
       const environmentContext = record(context.paperclipEnvironment);
       const workspaceContext = record(context.paperclipWorkspace);