docs: Archive codebase-improvements specs.

Author: Splode

…ges/codebase-improvements/.openspec.yaml …-02-codebase-improvements/.openspec.yamlopenspec/changes/codebase-improvements/.openspec.yaml renamed to openspec/changes/archive/2026-03-02-codebase-improvements/.openspec.yaml openspec/changes/codebase-improvements/.openspec.yaml renamed to openspec/changes/archive/2026-03-02-codebase-improvements/.openspec.yaml

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+### Requirement: Generator accepts a custom Dictionary
+The `WithDictionary` option SHALL allow a caller to supply a `*Dictionary` instance, replacing the default embedded word lists.
+
+#### Scenario: Custom adjectives are used in generated names
+- **WHEN** a caller provides a Dictionary with a custom adjective list
+- **THEN** generated names only use words from that custom adjective list
+
+#### Scenario: Custom noun list is respected
+- **WHEN** a caller provides a Dictionary with a custom noun list
+- **THEN** generated names only use words from that custom noun list
+
+#### Scenario: Nil dictionary falls back to default
+- **WHEN** a caller passes `nil` as the Dictionary to `WithDictionary`
+- **THEN** the generator uses the default embedded Dictionary
+
+### Requirement: Dictionary can be constructed with custom word lists
+The `NewDictionary` constructor (or an alternative constructor) SHALL accept optional word lists so callers can build a Dictionary without embedding data files.
+
+#### Scenario: Caller-provided word slices are used
+- **WHEN** a caller constructs a Dictionary with custom adjective and noun slices
+- **THEN** the Dictionary reports the correct lengths for those word categories
+
+#### Scenario: Empty word list for unused category is valid
+- **WHEN** a caller constructs a 2-word Generator with a Dictionary that has an empty verb list
+- **THEN** generation succeeds because verbs are not used for size-2 names