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fix(cli): default new agents to PYTHON_3_13 instead of PYTHON_3_14 #1646

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fix(cli): default new agents to PYTHON_3_13 instead of PYTHON_3_14 #1646

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1cb7a61
fix(cli): default new agents to PYTHON_3_13 instead of PYTHON_3_14
aidandaly24 Jun 25, 2026
ec3e86b
docs: update runtimeVersion examples to PYTHON_3_13
aidandaly24 Jun 26, 2026
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4 changes: 2 additions & 2 deletions docs/configuration.md
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Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,7 @@ Main project configuration using a **flat resource model**. Agents, memories, an
"build": "CodeZip",
"entrypoint": "main.py",
"codeLocation": "app/MyAgent/",
"runtimeVersion": "PYTHON_3_14",
"runtimeVersion": "PYTHON_3_13",
"networkMode": "PUBLIC",
"protocol": "HTTP"
}
Expand Down Expand Up @@ -168,7 +168,7 @@ on the next deployment.
"build": "CodeZip",
"entrypoint": "main.py",
"codeLocation": "app/MyAgent/",
"runtimeVersion": "PYTHON_3_14",
"runtimeVersion": "PYTHON_3_13",
"networkMode": "PUBLIC",
"envVars": [{ "name": "MY_VAR", "value": "my-value" }],
"instrumentation": {
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2 changes: 1 addition & 1 deletion docs/container-builds.md
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Expand Up @@ -81,7 +81,7 @@ In `agentcore.json`, set `"build": "Container"`:
"build": "Container",
"entrypoint": "main.py",
"codeLocation": "app/MyAgent/",
"runtimeVersion": "PYTHON_3_14"
"runtimeVersion": "PYTHON_3_13"
}
```

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2 changes: 1 addition & 1 deletion src/cli/operations/agent/generate/__tests__/schema-mapper.test.ts
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Expand Up @@ -87,7 +87,7 @@ describe('mapGenerateConfigToAgent', () => {
expect(result.name).toBe('TestProject');
expect(result.build).toBe('CodeZip');
expect(result.entrypoint).toBe('main.py');
expect(result.runtimeVersion).toBe('PYTHON_3_14');
expect(result.runtimeVersion).toBe('PYTHON_3_13');
expect(result.networkMode).toBe('PUBLIC');
expect(result.protocol).toBe('HTTP');
});
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16 changes: 15 additions & 1 deletion src/cli/tui/screens/mcp/__tests__/types.test.ts
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@@ -1,4 +1,10 @@
import { AUTHORIZER_TYPE_OPTIONS, ENTER_KB_ID_MANUALLY, SKIP_FOR_NOW, TARGET_TYPE_OPTIONS } from '../types.js';
import {
AUTHORIZER_TYPE_OPTIONS,
ENTER_KB_ID_MANUALLY,
PYTHON_VERSION_OPTIONS,
SKIP_FOR_NOW,
TARGET_TYPE_OPTIONS,
} from '../types.js';
import { describe, expect, it } from 'vitest';

describe('MCP types constants', () => {
Expand Down Expand Up @@ -26,4 +32,12 @@ describe('MCP types constants', () => {
// the screen branches on this exact id when the user picks the manual path.
expect(ENTER_KB_ID_MANUALLY).toBe('__enter_kb_id__');
});

it('PYTHON_VERSION_OPTIONS defaults to a universally-available runtime, not PYTHON_3_14', () => {
// 3.14 is not yet GA in every region, so it must not be the first/highlighted pick.
expect(PYTHON_VERSION_OPTIONS[0]?.id).toBe('PYTHON_3_13');
expect(PYTHON_VERSION_OPTIONS[0]?.id).not.toBe('PYTHON_3_14');
// 3.14 stays selectable for users in supported regions.
expect(PYTHON_VERSION_OPTIONS.some(opt => opt.id === 'PYTHON_3_14')).toBe(true);
});
});
4 changes: 2 additions & 2 deletions src/cli/tui/screens/mcp/types.ts
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Expand Up @@ -425,8 +425,8 @@ export const POLICY_ENGINE_MODE_OPTIONS = [
] as const;

export const PYTHON_VERSION_OPTIONS = [
{ id: 'PYTHON_3_14', title: 'Python 3.14', description: 'Latest' },
{ id: 'PYTHON_3_13', title: 'Python 3.13', description: '' },
{ id: 'PYTHON_3_13', title: 'Python 3.13', description: 'Recommended' },
{ id: 'PYTHON_3_14', title: 'Python 3.14', description: 'Not yet available in all regions' },

@agentcore-cli-automation agentcore-cli-automation Jun 26, 2026

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The picker copy here is good — Recommended / Not yet available in all regions clearly steers users to the safe choice while keeping 3.14 selectable. Just noting that this is the only user-facing surface that explains the constraint; the docs at docs/configuration.md and docs/container-builds.md still hardcode PYTHON_3_14 in their example agentcore.json snippets and should be updated in this PR to match the new default.

@aidandaly24 aidandaly24 Jun 26, 2026

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Done — updated the example agentcore.json snippets in docs/configuration.md (lines 34 and 171) and docs/container-builds.md (line 84) to PYTHON_3_13 so they match the new default. The Runtime Versions reference list still includes PYTHON_3_14 since it remains a selectable opt-in value. Fixed in commit ec3e86b.

{ id: 'PYTHON_3_12', title: 'Python 3.12', description: '' },
{ id: 'PYTHON_3_11', title: 'Python 3.11', description: '' },
{ id: 'PYTHON_3_10', title: 'Python 3.10', description: '' },
Expand Down
6 changes: 6 additions & 0 deletions src/schema/__tests__/constants.test.ts
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
import {
DEFAULT_PYTHON_VERSION,
LANGUAGE_FRAMEWORK_MATRIX,
ModelProviderSchema,
NetworkModeSchema,
Expand Down Expand Up @@ -75,6 +76,11 @@ describe('RuntimeVersionSchemas', () => {
expect(NodeRuntimeSchema.safeParse('NODE_24').success).toBe(false);
expect(RuntimeVersionSchema.safeParse('RUBY_3_0').success).toBe(false);
});

it('defaults new agents to a universally-available Python runtime (not PYTHON_3_14)', () => {
expect(DEFAULT_PYTHON_VERSION).toBe('PYTHON_3_13');
expect(PythonRuntimeSchema.safeParse(DEFAULT_PYTHON_VERSION).success).toBe(true);
});
});

describe('NetworkModeSchema', () => {
Expand Down
2 changes: 1 addition & 1 deletion src/schema/constants.ts
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Expand Up @@ -150,7 +150,7 @@ export const PythonRuntimeSchema = z.enum(['PYTHON_3_10', 'PYTHON_3_11', 'PYTHON
export type PythonRuntime = z.infer<typeof PythonRuntimeSchema>;

/** Default Python runtime version for new agents and MCP tools */
export const DEFAULT_PYTHON_VERSION: PythonRuntime = 'PYTHON_3_14';
export const DEFAULT_PYTHON_VERSION: PythonRuntime = 'PYTHON_3_13';

export const NodeRuntimeSchema = z.enum(['NODE_18', 'NODE_20', 'NODE_22']);
export type NodeRuntime = z.infer<typeof NodeRuntimeSchema>;
Expand Down
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