A small agency (1-15 person team) building agentic features on paid client work in 2026 should pick its agent protocol per project by reading the client's existing stack (Anthropic-aligned client → MCP; Google-aligned client → A2A; sovereignty- or self-hosted-aligned client → Llama Stack), default to MCP for tool-heavy work and A2A for agent-collaboration work when the client has no existing stack, and keep its tool inventory portable by building every tool as a plain HTTP service first and wrapping it to the chosen protocol second. The plain-HTTP-first discipline costs roughly 20-30% extra on the first tool of a project and produces 60% wrapper-effort reduction on the second client requesting the same functionality on a different protocol. Tracking wrapper hours separately from service hours in the agency's time log is the simplest instrument for quoting the re-platform cost accurately when a client asks.
Claim is scoped to the protocol-picking and portability discipline for a small agency building (not just consuming) agentic features. Quantitative figures (20-30% first-tool cost, 60% re-implementation reduction) are derived from informal reports across 2025-2026 small-agency engagements and would benefit from a published benchmark — flagged in trigger condition 3. 45-day review cadence calibrated to typical SaaS/consulting client review cycles. Trigger conditions: (1) MCP, A2A, and Llama Stack publish a converged or interoperable spec — would move toward Partial because the protocol-picking decision becomes less consequential; (2) one of the major proprietary platforms (Microsoft, Salesforce, SAP, ServiceNow) adopts MCP or A2A as a first-class default — would shift the picking logic materially for clients on those platforms; (3) a published 2026 SMB-services-agency benchmark on protocol-switching costs and HTTP-first portability — would empirically anchor the rule with real numbers and either confirm or revise the cost figures cited; (4) emergence of a multi-protocol wrapper-generator toolkit reducing per-protocol wrapper cost materially — would lower the discipline's cost-of-adoption and broaden the rule's applicability.
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The claim: A small agency (1-15 person team) building agentic features on paid client work in 2026 should pick its agent protocol per project by reading the client's existing stack (Anthropic-aligned client → MCP; Google-aligned client → A2A; sovereignty- or self-hosted-aligned client → Llama Stack), default to MCP for tool-heavy work and A2A for agent-collaboration work when the client has no existing stack, and keep its tool inventory portable by building every tool as a plain HTTP service first and wrapping it to the chosen protocol second. The plain-HTTP-first discipline costs roughly 20-30% extra on the first tool of a project and produces 60% wrapper-effort reduction on the second client requesting the same functionality on a different protocol. Tracking wrapper hours separately from service hours in the agency's time log is the simplest instrument for quoting the re-platform cost accurately when a client asks.
About this register
The Operators register tracks claims published from practitioner-advisory pieces addressed to solo founders, micro-SMB, and small businesses up to around fifty people. Claims are reviewed on a 30–45 day cadence — tooling and SMB-relevant pricing shift faster than enterprise procurement signals.
Recent corrections in Operators
- OPS-068 · Partial · 17 Jun 2026
Source-text re-review: the '$300-$500 (2024) toward $100-$130 (early 2026)' median trajectory is not stated in either cited source — the Godberry Studios teardown reports stack cost by revenue tier (not a year-over-year median) and BetterCloud's SaaS-industry data covers enterprise spend, not solopreneur AI subscriptions. The compression direction is supported by the Godberry tier data and observable foundation-model bundling; the specific year-anchored median figures are reclassified as source:our-estimate in the article. The load-bearing claim (active compression / category-collapse) holds; status moved to Partial pending a primary source carrying a dated solopreneur-median series.
- OPS-051 · Partial · 10 Jun 2026
One named member of the generation cluster was already defunct at publication: Tome shut down its presentation/narrative product (Tome Slides) in March 2025 and pivoted to sales tooling, with the brand later sold to AngelList (deckary.com shutdown timeline; signalhub.substack.com post-mortem, both checked 10 Jun 2026). The generation cluster reduces to Pitch + Gamma. The two-cluster thesis itself is unaffected and arguably strengthened — the pure AI-narrative product failed to find a sustainable business while Gamma (70M users, $100M ARR as of Nov 2025) and the assembly cluster (PandaDoc, Better Proposals, Proposify per Luniq 2026 agency comparison) both compound. Status Up → Partial for the factual error in the tool list.
- OPS-022 · Partial · 10 Jun 2026
Vendor attribution error in the claim text. The claim names Polley Faith among 'Spellbook with named small-firm customers Westaway, KMSC Law, Polley Faith'. Polley Faith LLP is a Harvey-listed law-firm customer, not a Spellbook customer: the live Spellbook site (now spellbook.com; spellbook.legal 301-redirects) names Westaway, KMSC Law, and McInnes Cooper with no Polley Faith, and the source article's own body correctly places Polley Faith on Harvey's roster — the claim text and the article excerpt bundled it with the wrong vendor at publish. The remaining legs verify against extracted source text on 10 Jun 2026: Anthropic's GC AI customer story carries 'More than 1,500 companies' and '14 hours saved per week on average ... based on a survey of more than 100 active customers' verbatim; Harvey's published roster (Thompson Hine, Fox Rothschild, Lowenstein Sandler, Polley Faith) matches; ABA Formal Opinion 512 remains the governance baseline. The corpus reading (AI ships at 1-to-20 lawyer scale; privileged work stays on Enterprise-tier zero-retention access) is unaffected. Status Up -> Partial.
Reviews coming up in Operators
- OPS-030 · Holding · next +9d (27 Jun 2026)
The fastest path for an owner-operator to build practical agentic-AI competence in 2026 is the three-week build-by-ship…
- OPS-029 · Holding · next +9d (27 Jun 2026)
For solo founders and small teams (under ~50 people) building with AI in 2026, the build-vs-buy decision tree has inver…
- OPS-005 · Holding · next +9d (27 Jun 2026)
At sub-1M tokens per month (typical SMB agent volume) in 2026, the absolute dollar gap between Claude Haiku 4.5, GPT-4o…