fix: update conversations send workflow contract

[andrei-hasna]

Summary

• update the agent workflow template conversations send examples to the installed positional contract
• replace stale --space/--content send flags with --channel plus explicit --from
• add a two-sided parser fixture test for generated send commands

Refs #64
Todos: 5195e4f9-4f81-4794-86f8-c135c7413ffb

Validation

• conversations --version: 0.5.33
• conversations send --help: Usage: conversations send [options] ; options include --from and --channel, not --content or --space
• bun test scripts/seed-workflow.test.ts: 3 pass, 0 fail, 13 expect() calls
• bun test: 635 pass, 0 fail, 2656 expect() calls
• bun run typecheck: tsc --noEmit exit 0
• bun run build: exit 0
• disposable readback: agent-workflow-template contains positional send commands and no stale generated send flags
• package-manager-scan repo-only: clean, 2 files
• staged diff secrets scan: filesScanned 1, findingCount 0, errors []

Scope

Stopped before independent review, merge, publish, install, or managed-home render rollout.

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[andrei-hasna]

[REVIEW] GO — #74 @ 62bbc9b — lens: correctness+security+gates, reviewer Aruns (1 of 1)

Reviewed the exact PR candidate against freshly fetched origin/main b9f6ed9.

What I ran (stdout and stderr captured separately; exit codes measured unpiped):

• git log --oneline origin/main..HEAD — exit 0.
• git diff origin/main...HEAD --stat — exit 0; 2 files changed, 147 insertions, 2 deletions.
• git diff origin/main...HEAD — exit 0; full diff read.
• conversations send --help — exit 0; confirms conversations send [options] <message> with --channel <name> and --from <agent>.
• bun install — exit 0; setup only, not reported as a test gate.
• bun run typecheck — exit 0; pass, no pass/fail counts emitted by tsc --noEmit.
• bun run test — exit 0; 635 pass, 0 fail, 2656 expect() calls, 55 files.

What I read:

• Full diff for scripts/seed-workflow.ts and new scripts/seed-workflow.test.ts.
• Complete surrounding source for both changed files.
• scripts/seed.ts, package.json, and repository references to seed-workflow / agent-workflow-template / conversations send.
• Installed CLI help for the exact conversations send surface.

Blocking P0/P1 findings: none. The generated examples now match the reachable installed CLI contract, the regression fixture exercises the two generated commands and rejects the stale --space / --content form, and the change introduces no new credential, authorization, mutation, or trust-boundary path.

Non-blocking follow-ups: none.