The render half landed first deliberately, so the marker can no longer reach a
member as literal text. This is the half that turns the feature on, and it is
now safe to write in either order.

When a registry is configured the system prompt lists the keys and states the
terminal rule. A model that does not know an invocation must be the whole reply
writes one as a prefix and gets refused for a reason it cannot see, so the rule
belongs in the prompt beside the keys rather than only in the validator.

It names keys and never texts. A model handed the text composes with it, which
is the behaviour a registry exists to replace, and it would put member-facing
wording back inside something a model can paraphrase. Pinned by a test.

Appended to the built prompt rather than written into BuildSystemPrompt. That
keeps every existing caller unchanged, and it means the snapshot generator and
the policy check, which hold no registry, render exactly what they rendered
before. So the tracked prompt snapshots do not move and the evaluation packs
see no change.

The feature is still off. Nothing sets SIRENS_ECHO_PHRASES, so the registry is
empty, the prompt is byte-identical to today, and no reply can invoke anything.
Turning it on is a deployment variable, which is the same shape the content
gate and the scratchpad shipped in.

Worth naming for whoever turns it on: this changes every turn's system block on
the profile that enables it, so it wants the evaluation cadence run against it
rather than being switched on quietly.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Co-authored-by: Kai Siren <coilysiren@gmail.com>
Co-authored-by: Claude <noreply@anthropic.com>

coilyco-ops requested review from coilysiren

2026-08-13 16:47:25 +00:00

coilyco-ops referenced this pull request

2026-08-13 16:47:48 +00:00

Give the model a first-class way to invoke canonical phrases, tracked in git and rendered in the blockquote-code form #176

coilyco-ops merged commit dcd37925f7 into main

2026-08-13 16:48:31 +00:00

coilyco-ops referenced this pull request from a commit

2026-08-13 16:48:33 +00:00

Merge pull request 'feat(phrases): tell the model which keys exist, once a registry is configured' (#595) from coilyco-ops/tell-the-model-which-phrases-exist into main

coilyco-ops referenced this pull request

2026-08-13 17:10:43 +00:00