Add `get_last_session_id()` to Python and Go SDKs by Copilot · Pull Request #671 · github/copilot-sdk

Copilot · 2026-03-05T00:50:45Z

Python and Go were missing CopilotClient.get_last_session_id() which TS and .NET already expose. Adds the method to both SDKs with E2E tests.

Python

async def get_last_session_id(self) -> str | None in CopilotClient

last_id = await client.get_last_session_id()
if last_id:
    session = await client.resume_session(last_id, {"on_permission_request": PermissionHandler.approve_all})

Go

GetLastSessionID(ctx context.Context) (*string, error) on *Client
Added getLastSessionIDRequest / getLastSessionIDResponse types

lastID, err := client.GetLastSessionID(ctx)
if err != nil {
    log.Fatal(err)
}
if lastID != nil {
    session, err := client.ResumeSession(ctx, *lastID, &copilot.ResumeSessionConfig{
        OnPermissionRequest: copilot.PermissionHandler.ApproveAll,
    })
}

Tests & Docs

E2E tests added for both languages using shared snapshot test/snapshots/session/should_get_last_session_id.yaml
Go README updated to list the new method

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

https://api.github.com/copilot_internal/user
- Triggering command: /opt/hostedtoolcache/node/22.22.0/x64/bin/node node /home/REDACTED/work/copilot-sdk/copilot-sdk/nodejs/node_modules/@github/copilot/index.js --headless --no-auto-update --log-level info --stdio -nolocalimports -importcfg /tmp/go-build371754144/b135/importcfg -pack /opt/hostedtoolcache/go/1.24.13/x64/src/go/parser/interface.go 0285�� x64/src/net 0285230/b124/ c --gdwarf-5 --64 -o x64/pkg/tool/lin/tmp/go-build371754144/b089/vet.cfg (http block)
- Triggering command: /opt/hostedtoolcache/node/22.22.0/x64/bin/node node /home/REDACTED/work/copilot-sdk/copilot-sdk/nodejs/node_modules/@github/copilot/index.js --headless --no-auto-update --log-level info -I x64/pkg/tool/linux_amd64/vet --gdwarf-5 --64 -o x64/pkg/tool/lin/tmp/go-build371754144/b061/vet.cfg .cfg�� ache/go/1.24.13/x64/src/os/user -I x64/pkg/tool/linux_amd64/vet --gdwarf-5 --64 -o x64/pkg/tool/lin/tmp/go-build371754144/b168/vet.cfg (http block)
- Triggering command: /opt/hostedtoolcache/node/22.22.0/x64/bin/node node /home/REDACTED/work/copilot-sdk/copilot-sdk/nodejs/node_modules/@github/copilot/index.js --headless --no-auto-update --log-level info --stdio x64/pkg/tool/linux_amd64/vet --gdwarf-5 --64 -o x64/pkg/tool/lin/tmp/go-build371754144/b091/vet.cfg 0285�� .cfg -I x64/pkg/tool/linux_amd64/vet --gdwarf-5 --64 -o x64/pkg/tool/lin-importcfg (http block)

If you need me to access, download, or install something from one of these locations, you can either:

Configure Actions setup steps to set up my environment, which run before the firewall is enabled
Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

This section details on the original issue you should resolve

<issue_title>Python and Go lack CopilotClient.get_last_session_id()</issue_title>
<issue_description>TS and .NET have it. I'm not sure if that's on purpose or an accident.</issue_description>

<agent_instructions>Review issue, implement across the SDKs and make sure we cover it appropriately with tests.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

Fixes Python and Go lack CopilotClient.get_last_session_id() #608

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

Co-authored-by: patniko <26906478+patniko@users.noreply.github.com>

Copilot

Pull request overview

Adds parity across SDKs by exposing “last updated session id” retrieval in the Python and Go clients (matching existing TS/.NET behavior) and validates via E2E snapshots.

Changes:

Python: add CopilotClient.get_last_session_id() that calls session.getLastId.
Go: add (*Client).GetLastSessionID(...) plus request/response types for session.getLastId.
Tests/docs: add shared E2E snapshot + language-specific E2E coverage; update Go README API list.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
`test/snapshots/session/should_get_last_session_id.yaml`	Snapshot exchange for the new “Say hello” session persistence scenario.
`python/e2e/test_session.py`	Adds Python E2E verifying `get_last_session_id()` returns the created session ID.
`python/copilot/client.py`	Implements `get_last_session_id()` via JSON-RPC `session.getLastId`.
`go/types.go`	Adds internal request/response structs for `session.getLastId`.
`go/internal/e2e/session_test.go`	Adds Go E2E verifying `GetLastSessionID` returns the created session ID.
`go/client.go`	Implements `GetLastSessionID` on the Go client.
`go/README.md`	Documents the new Go client method in the API reference list.

Copilot · 2026-03-05T01:09:11Z

go/client.go

+//	        OnPermissionRequest: copilot.PermissionHandler.ApproveAll,
+//	    })
+//	}
+func (c *Client) GetLastSessionID(ctx context.Context) (*string, error) {


GetLastSessionID accepts a ctx but never uses it; if the client is disconnected and AutoStart is enabled, it will start using context.Background() via ensureConnected(), so caller cancellation/deadlines are ignored. Consider following the pattern used by GetForegroundSessionID (start with the provided ctx when c.client == nil) so the method respects the supplied context.

Suggested change

func (c *Client) GetLastSessionID(ctx context.Context) (*string, error) {

func (c *Client) GetLastSessionID(ctx context.Context) (*string, error) {

if ctx == nil {

ctx = context.Background()

}

// Respect caller cancellation/deadlines before attempting to connect.

select {

case <-ctx.Done():

return nil, ctx.Err()

default:

}

Copilot · 2026-03-05T01:09:11Z

go/README.md

 - `ResumeSessionWithOptions(sessionID string, config *ResumeSessionConfig) (*Session, error)` - Resume with additional configuration
 - `ListSessions(filter *SessionListFilter) ([]SessionMetadata, error)` - List sessions (with optional filter)
 - `DeleteSession(sessionID string) error` - Delete a session permanently
+- `GetLastSessionID(ctx context.Context) (*string, error)` - Get the ID of the most recently updated session


The API reference list is inconsistent about whether context.Context parameters are shown (e.g., DeleteSession(sessionID string) omits ctx while GetLastSessionID(ctx context.Context) includes it). Please align this new entry with the surrounding documentation style so the list is consistent and not misleading about call signatures.

Suggested change

- `GetLastSessionID(ctx context.Context) (*string, error)` - Get the ID of the most recently updated session

- `GetLastSessionID() (*string, error)` - Get the ID of the most recently updated session

Initial plan

46d8414

Copilot AI assigned Copilot and patniko Mar 5, 2026

Copilot started work on behalf of patniko March 5, 2026 00:50 View session

Add get_last_session_id() to Python and Go SDKs with E2E tests

9ebc0d0

Co-authored-by: patniko <26906478+patniko@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Add CopilotClient.get_last_session_id() to Python and Go SDKs~~ Add get_last_session_id() to Python and Go SDKs Mar 5, 2026

Copilot finished work on behalf of patniko March 5, 2026 01:01

patniko marked this pull request as ready for review March 5, 2026 01:04

patniko requested a review from a team as a code owner March 5, 2026 01:04

Copilot AI review requested due to automatic review settings March 5, 2026 01:04

patniko merged commit 3a00c02 into main Mar 5, 2026
28 of 32 checks passed

patniko deleted the copilot/add-copilotclient-get-last-session-id branch March 5, 2026 01:05

Copilot started reviewing on behalf of patniko March 5, 2026 01:05 View session

Copilot AI reviewed Mar 5, 2026

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Add `get_last_session_id()` to Python and Go SDKs#671

Add `get_last_session_id()` to Python and Go SDKs#671
patniko merged 2 commits intomainfrom
copilot/add-copilotclient-get-last-session-id

Copilot AI commented Mar 5, 2026 •

edited

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-func (c *Client) GetLastSessionID(ctx context.Context) (*string, error) {
+func (c *Client) GetLastSessionID(ctx context.Context) (*string, error) {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	// Respect caller cancellation/deadlines before attempting to connect.
+	select {
+	case <-ctx.Done():
+		return nil, ctx.Err()
+	default:
+	}

	- `GetLastSessionID(ctx context.Context) (*string, error)` - Get the ID of the most recently updated session
	- `GetLastSessionID() (*string, error)` - Get the ID of the most recently updated session

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Python

Go

Tests & Docs

I tried to connect to the following addresses, but was blocked by firewall rules:

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Pull request overview

Reviewed changes

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Copilot AI commented Mar 5, 2026 •

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