canon/definitions: DOLCHEO vocabulary (tier 2) — adds Open as the seventh letter

[klappy]

Adds canon/definitions/dolcheo-vocabulary.md (tier 2) as the canon home for the vocabulary. Supersedes docs/oddkit/proactive/dolche-vocabulary.md by adding Open as the seventh letter: the forward-pointing thread that stays with the current owner.

Summary

Seven letters: Decision, Observation (closed), Learning, Constraint, Handoff, Encode, Open.

Both Os retain the single letter O; section placement and an optional -open tag suffix disambiguate closed Observation from Open item. Open items carry priority bands (P1..Pn, with sub-bands like P1.1). Open vs Handoff distinguished by ownership — Open stays with the current owner; Handoff transfers.

The odd/ledger/2026-04-19-agent-team-pilot.md ledger (open in #109) is the first DOLCHEO-native ledger and is referenced as the working example.

Why canon (not docs)

This vocabulary governs how session capture works across all oddkit-powered projects. It also sets the contract that oddkit_encode must satisfy — the tool must accept all seven prefixes, return per-artifact arrays for batched input, and read this vocabulary at runtime via prompt-over-code (live canon → bundled baseline → fail-loud). That contract lives in canon, not docs.

Backward compatibility

Every DOLCHE journal is a valid DOLCHEO journal with zero Open entries. Trigger phrases (encode DOLCHE, journal this, run the gauntlet) continue to work.

Gauntlet

• oddkit_preflight — clean
• oddkit_challenge in canon-tier-2 mode — block_until_addressed: false; prior-art (GTD's Next Actions / Waiting For, kanban, issue trackers), scope boundaries, and retraction conditions addressed inline in a dedicated section
• Writing Canon 8-point checklist — pass (title, blockquote, metadata, summary, header scan, no buried claims, axiom space, ghost writer)
• Frontmatter schema (canon/meta/frontmatter-schema) — native YAML types: tier: 2 unquoted, date: 2026-04-19 unquoted, epoch: E0008.3 unquoted simple identifier, strings with punctuation quoted
• AI voice clichés (canon/constraints/ai-voice-cliches) — one negation-parallelism pattern caught and rewritten; em-dash density in body prose reduced from 46 to 40

Next

Unblocks the oddkit_encode batch-mode + prompt-over-code canary refactor (next PR on klappy/oddkit), which reads this vocabulary at runtime. Canon ships before the code that reads it.

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Note

Low Risk
Low risk: changes are documentation/governance additions that don’t alter runtime code, but they define a new contract that future oddkit_encode implementations must follow.

Overview
Defines DOLCHEO as the new tier-2 canon vocabulary for session capture by adding Open as a seventh dimension (unresolved, owner-retained threads) with priority bands and explicit disambiguation from closed Observations while keeping the single-letter O.

Adds new encoding-type docs for E (Encode) and O with facet: open (Open items), and updates the Observation encoding-type doc to cross-reference the new Open/Observation split and section-based classification expectations for oddkit_encode.

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[klappy]

The second commit on this PR (9cb7459) adds the missing per-type governance docs so all seven DOLCHEO dimensions surface independently in BM25.

What this commit adds

• odd/encoding-types/encode.md (new) — letter E, meta-level action. Previously referenced by how-to-write-encoding-types.md as an existing type but had no governance doc. Now it does.
• odd/encoding-types/open.md (new) — letter O with facet: open. Registers alongside observation.md (which remains the fallback). Classification preference documented inline: sections headed Open items or forward-pointing → Open regardless of trigger words; [O-open] prefix → Open; bare [O] outside an Open items section → closed Observation.
• odd/encoding-types/observation.md (light touch) — added a See Also footer pointing at open.md and the umbrella canon doc so the O-letter collision is traversable from either side in search.

All three mirror the minimal template established by the existing type docs (decision.md, learning.md, constraint.md, handoff.md): frontmatter tagged encoding-type for discovery, opening blockquote, Type Identity table (with Facet row on open.md), Field Schema, Trigger Words.

Gauntlet for this commit

• oddkit_challenge in canon-tier-2 mode on the pair — block_until_addressed: false. The prerequisites surfaced (evidence, prior art, scope, retraction conditions) are all addressed in the umbrella doc's Scope, Prior Art, and Retraction Conditions section. These files are structural companions, not independent principle-extractions.
• Frontmatter schema — native YAML types, all required universal fields present.
• AI-voice clichés — no negation parallelism, no formulaic transitions, em-dash density normal.

This isn't a pivot — it's continuation of the existing per-type governance pattern that DOLCHE established under odd/encoding-types/. DOLCHEO just had two letters missing from that inventory (E was referenced but never authored; O-open is the newly-named seventh type).