docs: draft TrustMarket join with the flag off

[DealAppSeo]

Draft join copy for TrustMarket. The join flag is off. This file is not a live listing. It does not open a listing, take a payment, or turn staking on.

Headline line: A portable trust harness. Autonomy is earned.

Related to #191.

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Project	Deployment	Actions	Updated
trustshell-landing	Ready	Preview	Sep 26, 2026 10:45pm UTC

[strix-security]

Strix Security Review

No security issues found.

Review summary

The PR adds a documentation file (docs/TRUSTMARKET_JOIN.md) and its accompanying test (tests/trustmarket-join.test.ts). Both changes are non-security in nature: the documentation contains only copy describing that the TrustMarket join flag is off, and the test asserts against that static document content using fixed file paths with no untrusted input. No security-relevant code paths, user-controlled input, secrets, or dangerous sinks are introduced.

_{Updated for e9baabf.}

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[strix-security]

The PR adds a documentation file (docs/TRUSTMARKET_JOIN.md) and its accompanying test (tests/trustmarket-join.test.ts). Both changes are non-security in nature: the documentation contains only copy describing that the TrustMarket join flag is off, and the test asserts against that static document content using fixed file paths with no untrusted input. No security-relevant code paths, user-controlled input, secrets, or dangerous sinks are introduced.

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Reviewed by Strix
_{Configure security review settings}