extensions/copilot/src/extension/inlineEdits/node/nextEditProvider.ts:1107

• Calling this._specManager.cancelAll(SpeculativeCancelReason.Replaced) here guarantees any existing speculative is cancelled before starting a new one. That makes it impossible to “keep” a speculative across show/supersede flows, and it’s also redundant with SpeculativeRequestManager.setPending(...), which already cancels a previous pending request as Replaced.

If the intent is to only cancel on trajectory divergence / lifecycle shutdown, consider removing this eager cancelAll(Replaced) and letting setPending handle true slot replacement (or only cancelling when you can prove the old speculative is invalid).

		// Cancel any previous speculative request — we are about to install a new one.
		this._specManager.cancelAll(SpeculativeCancelReason.Replaced);

extensions/copilot/src/extension/inlineEdits/node/nextEditProvider.ts:1436

• PR description/model table indicates speculative requests should be kept alive on handleRejection (and similarly for ignored/dismissed) with trajectory checks being authoritative, but this code still cancels all speculative requests on rejection. If the table is the intended behavior, this needs to be adjusted; otherwise, please update the PR description/model to match the implemented cancellation triggers.

		// The user rejected the suggestion, so the speculative request (which
		// predicted the post-accept state) will never be reused. Cancel it to
		// avoid wasting a server slot.
		this._specManager.cancelAll(SpeculativeCancelReason.Rejected);

extensions/copilot/src/extension/inlineEdits/node/nextEditProvider.ts:1462

• PR description/model says the non-superseded ignored path should no longer cancel speculative requests, but this still calls cancelAll(IgnoredDismissed). If cancellation-on-dismiss is still intended, update the PR description/model; otherwise, remove this trigger and rely on trajectory/lifecycle invalidation.

		if (wasShown && !wasSuperseded) {
			// The shown suggestion was dismissed (not superseded by a new one),
			// so the speculative request for its post-accept state is useless.
			this._specManager.cancelAll(SpeculativeCancelReason.IgnoredDismissed);
			this._statelessNextEditProvider.handleIgnored?.();
		}