{"version":"2.1.248","anchor":"old-tool-calls-in-a-transcript-can-be-kept-even-after-the-to","canonical_anchor":"old-tool-calls-in-a-transcript-can-be-kept-even-after-the-to","heading":"Old tool calls in a transcript can be kept even after the tool is gone","tier":"notice","area":"Sessions","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.248\/e\/old-tool-calls-in-a-transcript-can-be-kept-even-after-the-to","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.248","markdown":"### Old tool calls in a transcript can be kept even after the tool is gone\n\nOld transcripts keep tool calls intact even when the tool no longer exists.\n\n**What**\n\nTranscript normalisation accepts a list of tool names to keep. Those names are added to the known-tool set and treated as known when rewriting tool call inputs, so historical calls to a tool the current registry no longer offers are not mangled. A companion option lists tool references that were stripped.\n\n**Evidence**\n\n`keptToolNames`\n\n- Area: Sessions\n- Tier: You'll notice\n- Useful: 2\/5\n- Signal: 2\/5"}