Package the canonical PQRST prompt faithfully

examples/pqrst-estimate was not the canonical PQRST prompt. The canonical one
is ~/pqrst-practice/PqrstPrompt.md, normatively specified in
spec/PqrstEstimationPractice.md, and hall-of-helix CLOSING.md requires pasting
that block unmodified. Ours was a paraphrase with a different output shape — no
Confidence, no Signature, no Dominant factors — and CANP-WP-0002-T03 made it
worse by prepending a house_style inclusion to a prompt whose governing
document says do not modify it.

A copied prompt that silently forked its source is the exact failure INTENT.md
opens with, sitting in this repo's own examples directory.

The template is now the canonical block extracted programmatically rather than
retyped, and the default render is byte-identical to it: 2886 bytes both ways.

The source documents two optional add-ons appended after the block. CPF has no
conditionals, so they are not a flag: `add_ons` is an input defaulting to the
empty string, and each sanctioned add-on is an example fixture. This is worth
noting as evidence about section 23's deferred "richer template syntax" — the
workaround is adequate here, but it is a workaround.

evals/canonical-fidelity.yaml guards the property with sixteen render checks,
including not_contains checks naming the paraphrase this package used to be, so
the drift cannot silently recur.

Version 0.2.1 -> 1.0.0: changed inputs and a materially different intended
output is the MAJOR case in section 17.

Section 22's worked example and the house-style README both claimed
pqrst-estimate composes the style fragment. It no longer does, by design, so
both are corrected; composition is illustrated in section 10.4 instead.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Bjefh8NUiEiahN4JLwoSKM

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 388925@bnt-lap001
Assistant-Session: 3507023f-e0fd-4a1e-9d90-a0d4217d1502

examples/pqrst-estimate/prompt.yaml

@@ -1,54 +1,49 @@
 format: canned-prompt/v0.2
 id: practice/pqrst-estimate
 name: PQRST Estimate
-version: 0.2.1
-summary: 'Produce a post-session estimate of effort distributed across the PQRST categories
-  for an agentic coding session.
-
-  '
+version: 1.0.0
+summary: >
+  The canonical end-of-session PQRST effort audit: allocate 100% of a completed
+  session's engineering effort across Problem, Quality, Research, Security and
+  Task organization.
 type: template
 template: prompt.md
-dependencies:
-  prompts:
-  - id: practice/house-style
-    version: '>= 0.1.0'
-    requirement: required
+
 inputs:
-- name: house_style
+- name: add_ons
   type: content
   required: false
-  description: 'Shared house-style block, composed from practice/house-style.
+  description: >
+    Optional text appended after the canonical block. Empty by default, so the
+    default render is the canonical prompt verbatim. The two sanctioned add-ons
+    are in examples/; see README.md.
+  default: ''
 
-    '
-  default:
-    include: practice/house-style
-- name: session_summary
-  type: content
-  required: true
-  description: 'Session transcript, summary, or sufficiently detailed account of the
-    work performed during the coding session.
-
-    '
-parameters:
-  include_rationale:
-    type: boolean
-    default: true
-    description: Explain the evidence behind the estimate.
 output:
-  format: markdown
-  description: A 100% PQRST effort allocation with concise interpretation.
+  format: text
+  description: >
+    A PQRST-Estimate record — five integer percentages summing to 100, plus
+    Sum, Confidence, Signature, Dominant factors and an optional Notes line.
+
 compatibility:
   capabilities:
   - long-context
+
+license: MIT
+
+examples:
+- examples/basic.yaml
+- examples/with-rationale.yaml
+evals:
+- evals/canonical-fidelity.yaml
+
 tags:
 - pqrst
 - retrospective
 - agentic-coding
 - effort-estimation
-license: MIT
+
 provenance:
-  author: canned-prompts seed
-examples:
-- examples/basic.yaml
-evals:
-- evals/quality.yaml
+  author: pqrst-practice
+  source: ~/pqrst-practice/PqrstPrompt.md
+  normative_spec: ~/pqrst-practice/spec/PqrstEstimationPractice.md